subject:"RE\: \[Repeater\-Builder\] Neat kit for switching repeater devices"

RE: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-03 Thread Eric Lemmon

Oops!  I just found that switch on both HPN9033A power supplies- hidden
beneath some nearly-invisible black tape that probably was affixed to keep
it from being nudged into the continuous position.  I shall now return to
the kitchen for a well-earned serving of crow!

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Milt
Sent: Monday, May 03, 2010 1:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices

  

The original GR1225 power supply was a linear Astron SL-14M good for 7A
continuous and 14A @ 20% duty cycle.  It had 2 molex connectors on the back,
one for the high current DC and the other, a 6 pin, for the fan. 
 
The current product is HPN9033A a Duracomm RP-15 switcher with a high
current pigtail and a second pigtail for the fan.  THese have the switch
just below the pigtails that either runs the fan constantly or follows the
thermal switching.
 
Milt
N3LTQ 

- Original Message - 
From: Larry Horlick <mailto:llhorl...@gmail.com>  
To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder@yahoogroups.com>  
Sent: Monday, May 03, 2010 9:21 AM
    Subject: Re: [Repeater-Builder] Neat kit for switching repeater
devices

What is the Moto part no. of the ps to which you refer?
 
lh

 
On 5/3/10, Milt  wrote: 

  

Eric,

The power supply on the RKR and GR series repeaters has a
switch which 
controls the action of the fan. It can either be thermally
controlled or 
run constantly.

Milt
N3LTQ

- Original Message - 
From: "Eric Lemmon" mailto:wb6...@verizon.net> >
To: mailto:Repeater-Builder%40yahoogroups.com> >

Sent: Saturday, May 01, 2010 11:04 PM
        Subject: RE: [Repeater-Builder] Neat kit for switching
repeater devices

> Larry,
>
> That's odd; both the GR1225 and RKR1225 repeaters I am
familiar with, 
> which
> use the R1225 transceiver, have a small thermal switch
that is wedged
> between two of the heat-sink fins. In both repeaters, the
fan runs only
> when the radio gets hot. I am surprised that you have a
repeater using 
> the
> R1225 in which the fan runs continuously. Perhaps this
installation is a
> prime candidate for a thermal switch!
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> [mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 7:13 PM
> To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> Subject: Re: [Repeater-Builder] Neat kit for switching
repeater devices
>
>
>
> This is excellent Eric. I have an R1225 repeater in a
GR500 case. There is 
> a
> fan but it runs continuously. The duty cycle is low but
because of the
> nature of
> the service there are times when it may be very high for
extended periods 
> of
> time.
> So most of the time the fan is not needed, but I want it
there for those
> rare occasions.
> I don't recognize the part no. on the fan it looks
remarkably similar to 
> the
> one stock in
> GR500. This will work very well for me. Thanks.
>
> lh
>
> On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon
mailto:wb6fly%40verizon.net> 
> <mailto:wb6...@verizon.net <mailto:wb6fly%40verizon.net> >
> wrote:
>
>
>
>
> Larry,
>
> My first use of this thermal switch was on a solar-powered
Motorola
> R1225
> UHF repeater at a commercial site. I simply drilled and
tapped two
> 4-40
> holes on a flat

RE: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-03 Thread Eric Lemmon

Oops!  I just found that switch on both HPN9033A power supplies- hidden
beneath some nearly-invisible black tape that probably was affixed to keep
it from being nudged into the continuous position.  I shall now return to
the kitchen for a well-earned serving of crow!

73, Eric Lemmon WB6FLY 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon
Sent: Monday, May 03, 2010 7:43 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices

  

Milt,

I just looked inside both a GR1225 and an RKR1225 power supply, and found no
such switch. Both power supplies are the standard, original equipment power
supplies made by Duracomm and bearing Motorola part number HPN9033A. Both
units have a hardwired thermal sensor that is intended to be inserted in the
heat sink fins, as described in the manual. The manual makes no mention of
an optional switch for fan control. There is a switch on the bottom of both
power supplies, but that switch is to set the input voltage range of the
power supply. What model power supply has the fan switch?

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
[mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Milt
Sent: Monday, May 03, 2010 5:23 AM
To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices

Eric,

The power supply on the RKR and GR series repeaters has a switch which 
controls the action of the fan. It can either be thermally controlled or 
run constantly.

Milt
N3LTQ

- Original Message - 
From: "Eric Lemmon" mailto:wb6fly%40verizon.net>
<mailto:wb6fly%40verizon.net> >
To: mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> >
Sent: Saturday, May 01, 2010 11:04 PM
Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices

> Larry,
>
> That's odd; both the GR1225 and RKR1225 repeaters I am familiar with, 
> which
> use the R1225 transceiver, have a small thermal switch that is wedged
> between two of the heat-sink fins. In both repeaters, the fan runs only
> when the radio gets hot. I am surprised that you have a repeater using 
> the
> R1225 in which the fan runs continuously. Perhaps this installation is a
> prime candidate for a thermal switch!
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> 
> [mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 7:13 PM
> To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> 
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices
>
>
>
> This is excellent Eric. I have an R1225 repeater in a GR500 case. There is

> a
> fan but it runs continuously. The duty cycle is low but because of the
> nature of
> the service there are times when it may be very high for extended periods 
> of
> time.
> So most of the time the fan is not needed, but I want it there for those
> rare occasions.
> I don't recognize the part no. on the fan it looks remarkably similar to 
> the
> one stock in
> GR500. This will work very well for me. Thanks.
>
> lh
>
> On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon mailto:wb6fly%40verizon.net> 
<mailto:wb6fly%40verizon.net> 
> <mailto:wb6...@verizon.net <mailto:wb6fly%40verizon.net>
<mailto:wb6fly%40verizon.net> > > wrote:
>
>
>
>
> Larry,
>
> My first use of this thermal switch was on a solar-powered Motorola
> R1225
> UHF repeater at a commercial site. I simply drilled and tapped two
> 4-40
> holes on a flat portion of the outside fin, and mounted the thermal
> switch
> after applying some heat-conductive paste. I used a three-inch
> low-EMI
> Panasonic fan blowing right on the fins. This is a 45-watt repeater
> set for
> about 30 watts output. It went into service early in 2003, and has
> been
> trouble-free ever since. I have attached a picture of what it looks
> like.
>
> 73, Eric Lemmon WB6FLY
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com> 
> <mailto:Repeater-Builder%40yahoogroups.com>
> [mai

RE: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-03 Thread Eric Lemmon

Milt,

I just looked inside both a GR1225 and an RKR1225 power supply, and found no
such switch.  Both power supplies are the standard, original equipment power
supplies made by Duracomm and bearing Motorola part number HPN9033A.  Both
units have a hardwired thermal sensor that is intended to be inserted in the
heat sink fins, as described in the manual.  The manual makes no mention of
an optional switch for fan control.  There is a switch on the bottom of both
power supplies, but that switch is to set the input voltage range of the
power supply.  What model power supply has the fan switch?

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Milt
Sent: Monday, May 03, 2010 5:23 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices

  

Eric,

The power supply on the RKR and GR series repeaters has a switch which 
controls the action of the fan. It can either be thermally controlled or 
run constantly.

Milt
N3LTQ

- Original Message - 
From: "Eric Lemmon" mailto:wb6fly%40verizon.net> >
To: mailto:Repeater-Builder%40yahoogroups.com> >
Sent: Saturday, May 01, 2010 11:04 PM
Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices

> Larry,
>
> That's odd; both the GR1225 and RKR1225 repeaters I am familiar with, 
> which
> use the R1225 transceiver, have a small thermal switch that is wedged
> between two of the heat-sink fins. In both repeaters, the fan runs only
> when the radio gets hot. I am surprised that you have a repeater using 
> the
> R1225 in which the fan runs continuously. Perhaps this installation is a
> prime candidate for a thermal switch!
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> [mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 7:13 PM
> To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices
>
>
>
> This is excellent Eric. I have an R1225 repeater in a GR500 case. There is

> a
> fan but it runs continuously. The duty cycle is low but because of the
> nature of
> the service there are times when it may be very high for extended periods 
> of
> time.
> So most of the time the fan is not needed, but I want it there for those
> rare occasions.
> I don't recognize the part no. on the fan it looks remarkably similar to 
> the
> one stock in
> GR500. This will work very well for me. Thanks.
>
> lh
>
> On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon mailto:wb6fly%40verizon.net> 
> <mailto:wb6...@verizon.net <mailto:wb6fly%40verizon.net> > > wrote:
>
>
>
>
> Larry,
>
> My first use of this thermal switch was on a solar-powered Motorola
> R1225
> UHF repeater at a commercial site. I simply drilled and tapped two
> 4-40
> holes on a flat portion of the outside fin, and mounted the thermal
> switch
> after applying some heat-conductive paste. I used a three-inch
> low-EMI
> Panasonic fan blowing right on the fins. This is a 45-watt repeater
> set for
> about 30 watts output. It went into service early in 2003, and has
> been
> trouble-free ever since. I have attached a picture of what it looks
> like.
>
> 73, Eric Lemmon WB6FLY
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> <mailto:Repeater-Builder%40yahoogroups.com>
> [mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 11:56 AM
> To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
> <mailto:Repeater-Builder%40yahoogroups.com>
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater
> devices
>
> Eric,
>
> This is good info. I have an immediate use for this. How have you
> actually
> attached this 'stat to the fin?
>
> Larry
>
> On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon mailto:wb6fly%40verizon.net> 
> <mailto:wb6fly%40verizon.net>
> <mailto:wb6...@verizon.net <mailto:wb6fly%40verizon.net>
<mailto:wb6fly%40verizon.net> > > wrote:
>
>
>
> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with
> many
> potential uses. However, using it for fan control is not only
> expensive,
> but unnecessary.
>

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-03 Thread Milt

The original GR1225 power supply was a linear Astron SL-14M good for 7A 
continuous and 14A @ 20% duty cycle.  It had 2 molex connectors on the back, 
one for the high current DC and the other, a 6 pin, for the fan. 

The current product is HPN9033A a Duracomm RP-15 switcher with a high current 
pigtail and a second pigtail for the fan.  THese have the switch just below the 
pigtails that either runs the fan constantly or follows the thermal switching.

Milt
N3LTQ 
  - Original Message - 
  From: Larry Horlick 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Monday, May 03, 2010 9:21 AM
  Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices





  What is the Moto part no. of the ps to which you refer?

  lh

   
  On 5/3/10, Milt  wrote: 
  
Eric,

The power supply on the RKR and GR series repeaters has a switch which 
controls the action of the fan. It can either be thermally controlled or 
run constantly.

Milt
N3LTQ

- Original Message - 
From: "Eric Lemmon" 
To: 


Sent: Saturday, May 01, 2010 11:04 PM
    Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices

> Larry,
>
> That's odd; both the GR1225 and RKR1225 repeaters I am familiar with, 
> which
> use the R1225 transceiver, have a small thermal switch that is wedged
> between two of the heat-sink fins. In both repeaters, the fan runs only
> when the radio gets hot. I am surprised that you have a repeater using 
> the
> R1225 in which the fan runs continuously. Perhaps this installation is a
> prime candidate for a thermal switch!
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 7:13 PM
    > To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices
>
>
>
> This is excellent Eric. I have an R1225 repeater in a GR500 case. There 
is 
> a
> fan but it runs continuously. The duty cycle is low but because of the
> nature of
> the service there are times when it may be very high for extended periods 
> of
> time.
> So most of the time the fan is not needed, but I want it there for those
> rare occasions.
> I don't recognize the part no. on the fan it looks remarkably similar to 
> the
> one stock in
> GR500. This will work very well for me. Thanks.
>
> lh
>
> On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon  <mailto:wb6...@verizon.net> > wrote:
>
>
>
>
> Larry,
>
> My first use of this thermal switch was on a solar-powered Motorola
> R1225
> UHF repeater at a commercial site. I simply drilled and tapped two
> 4-40
> holes on a flat portion of the outside fin, and mounted the thermal
> switch
> after applying some heat-conductive paste. I used a three-inch
> low-EMI
> Panasonic fan blowing right on the fins. This is a 45-watt repeater
> set for
> about 30 watts output. It went into service early in 2003, and has
> been
> trouble-free ever since. I have attached a picture of what it looks
> like.
>
> 73, Eric Lemmon WB6FLY
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> [mailto:Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 11:56 AM
> To: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater
> devices
>
> Eric,
>
> This is good info. I have an immediate use for this. How have you
> actually
> attached this 'stat to the fin?
>
> Larry
>
> On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon  <mailto:wb6fly%40verizon.net>
> <mailto:wb6...@verizon.net <mailto:wb6fly%40verizon.net> > > wrote:
>
>
>
> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with
> many
> potential uses. However, using it for fan control is not only
> expensive,
> but unnecessary.
>
> A fan blowing on a transmitter heat sink does absolutely nothing
> immediately
> after the transmitter is keyed, since the heat sink is likely at
> ambient
> temperature. It takes a period

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-03 Thread Larry Horlick

What is the Moto part no. of the ps to which you refer?

lh


On 5/3/10, Milt  wrote:
>
>
>
> Eric,
>
> The power supply on the RKR and GR series repeaters has a switch which
> controls the action of the fan. It can either be thermally controlled or
> run constantly.
>
> Milt
> N3LTQ
>
> - Original Message -
> From: "Eric Lemmon" >
> To: 
> >
> Sent: Saturday, May 01, 2010 11:04 PM
> Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices
>
> > Larry,
> >
> > That's odd; both the GR1225 and RKR1225 repeaters I am familiar with,
> > which
> > use the R1225 transceiver, have a small thermal switch that is wedged
> > between two of the heat-sink fins. In both repeaters, the fan runs only
> > when the radio gets hot. I am surprised that you have a repeater using
> > the
> > R1225 in which the fan runs continuously. Perhaps this installation is a
> > prime candidate for a thermal switch!
> >
> > 73, Eric Lemmon WB6FLY
> >
> >
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com
> > [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of Larry Horlick
> > Sent: Saturday, May 01, 2010 7:13 PM
> > To: Repeater-Builder@yahoogroups.com
> > Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices
> >
> >
> >
> > This is excellent Eric. I have an R1225 repeater in a GR500 case. There
> is
> > a
> > fan but it runs continuously. The duty cycle is low but because of the
> > nature of
> > the service there are times when it may be very high for extended periods
>
> > of
> > time.
> > So most of the time the fan is not needed, but I want it there for those
> > rare occasions.
> > I don't recognize the part no. on the fan it looks remarkably similar to
> > the
> > one stock in
> > GR500. This will work very well for me. Thanks.
> >
> > lh
> >
> > On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon 
> > 
> > <mailto:wb6...@verizon.net > > wrote:
> >
> >
> >
> >
> > Larry,
> >
> > My first use of this thermal switch was on a solar-powered Motorola
> > R1225
> > UHF repeater at a commercial site. I simply drilled and tapped two
> > 4-40
> > holes on a flat portion of the outside fin, and mounted the thermal
> > switch
> > after applying some heat-conductive paste. I used a three-inch
> > low-EMI
> > Panasonic fan blowing right on the fins. This is a 45-watt repeater
> > set for
> > about 30 watts output. It went into service early in 2003, and has
> > been
> > trouble-free ever since. I have attached a picture of what it looks
> > like.
> >
> > 73, Eric Lemmon WB6FLY
> >
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com
> > <mailto:Repeater-Builder%40yahoogroups.com
> >
> > [mailto:Repeater-Builder@yahoogroups.com
> > <mailto:Repeater-Builder%40yahoogroups.com>
> ] On Behalf Of Larry Horlick
> > Sent: Saturday, May 01, 2010 11:56 AM
> > To: Repeater-Builder@yahoogroups.com
> > <mailto:Repeater-Builder%40yahoogroups.com
> >
> > Subject: Re: [Repeater-Builder] Neat kit for switching repeater
> > devices
> >
> > Eric,
> >
> > This is good info. I have an immediate use for this. How have you
> > actually
> > attached this 'stat to the fin?
> >
> > Larry
> >
> > On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon 
> > 
> > <mailto:wb6fly%40verizon.net >
> > <mailto:wb6...@verizon.net   wb6fly%40verizon.net > > > wrote:
> >
> >
> >
> > Scott,
> >
> > I must agree that the CK1614 is an extremely versatile timer, with
> > many
> > potential uses. However, using it for fan control is not only
> > expensive,
> > but unnecessary.
> >
> > A fan blowing on a transmitter heat sink does absolutely nothing
> > immediately
> > after the transmitter is keyed, since the heat sink is likely at
> > ambient
> > temperature. It takes a period of time for the heat sink to warm up,
> > so
> > operating the fan prematurely is a waste of energy- which may be an
> > issue
> > for a solar-powered repeater.
> >
> > IMHO, the most efficient means of fan control is also the cheapest:
> > A
> > thermal switch. My first choice is a Cantherm #R2005015
> > normally-open
> > thermostat that closes at 50 degrees Celsius, about 122 degrees
> > Fahrenheit.
> >

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-03 Thread Milt

Eric,

The power supply on the RKR and GR series repeaters has a switch which 
controls the action of the fan.  It can either be thermally controlled or 
run constantly.

Milt
N3LTQ

- Original Message - 
From: "Eric Lemmon" 
To: 
Sent: Saturday, May 01, 2010 11:04 PM
Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices


> Larry,
>
> That's odd; both the GR1225 and RKR1225 repeaters I am familiar with, 
> which
> use the R1225 transceiver, have a small thermal switch that is wedged
> between two of the heat-sink fins.  In both repeaters, the fan runs only
> when the radio gets hot.  I am surprised that you have a repeater using 
> the
> R1225 in which the fan runs continuously.  Perhaps this installation is a
> prime candidate for a thermal switch!
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 7:13 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices
>
>
>
> This is excellent Eric. I have an R1225 repeater in a GR500 case. There is 
> a
> fan but it runs continuously. The duty cycle is low but because of the
> nature of
> the service there are times when it may be very high for extended periods 
> of
> time.
> So most of the time the fan is not needed, but I want it there for those
> rare occasions.
> I don't recognize the part no. on the fan it looks remarkably similar to 
> the
> one stock in
> GR500. This will work very well for me. Thanks.
>
> lh
>
> On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon  <mailto:wb6...@verizon.net> > wrote:
>
>
>
>
> Larry,
>
> My first use of this thermal switch was on a solar-powered Motorola
> R1225
> UHF repeater at a commercial site. I simply drilled and tapped two
> 4-40
> holes on a flat portion of the outside fin, and mounted the thermal
> switch
> after applying some heat-conductive paste. I used a three-inch
> low-EMI
> Panasonic fan blowing right on the fins. This is a 45-watt repeater
> set for
> about 30 watts output. It went into service early in 2003, and has
> been
> trouble-free ever since. I have attached a picture of what it looks
> like.
>
> 73, Eric Lemmon WB6FLY
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> [mailto:Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 11:56 AM
> To: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater
> devices
>
> Eric,
>
> This is good info. I have an immediate use for this. How have you
> actually
> attached this 'stat to the fin?
>
> Larry
>
> On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon  <mailto:wb6fly%40verizon.net>
> <mailto:wb6...@verizon.net <mailto:wb6fly%40verizon.net> > > wrote:
>
>
>
> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with
> many
> potential uses. However, using it for fan control is not only
> expensive,
> but unnecessary.
>
> A fan blowing on a transmitter heat sink does absolutely nothing
> immediately
> after the transmitter is keyed, since the heat sink is likely at
> ambient
> temperature. It takes a period of time for the heat sink to warm up,
> so
> operating the fan prematurely is a waste of energy- which may be an
> issue
> for a solar-powered repeater.
>
> IMHO, the most efficient means of fan control is also the cheapest:
> A
> thermal switch. My first choice is a Cantherm #R2005015
> normally-open
> thermostat that closes at 50 degrees Celsius, about 122 degrees
> Fahrenheit.
> When attached to a heat-sink fin, it turns the fan on when
> necessary, and
> keeps it on until the heat sink cools below about 100 degrees F-
> around body
> temperature. This particular switch is available from Digi-Key for
> about
> $9, as Catalog Number 317-1094-ND.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> <mailto:Repeater-Builder%40yahoogroups.com
> <mailto:Repeater-Builder%2540yahoogroups.com> >
> [mailto:Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> <mailto:Repeater-Builder%40yahoogroups.com
> <mailto:Repeater-Builder%2540yahoogroups.com> > ] On Behal

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-02 Thread Larry Horlick

Eric,

I too have seen that but for some reason these do not have it. I'm, not
certain,
but I think these systems were assembled piecemeal and not ordered as a
system.
If that is the case the thermal switch was omitted.

Anyway your solution is very simple and inexpensive.

lh

On Sat, May 1, 2010 at 11:04 PM, Eric Lemmon  wrote:

>
>
> Larry,
>
> That's odd; both the GR1225 and RKR1225 repeaters I am familiar with, which
> use the R1225 transceiver, have a small thermal switch that is wedged
> between two of the heat-sink fins. In both repeaters, the fan runs only
> when the radio gets hot. I am surprised that you have a repeater using the
> R1225 in which the fan runs continuously. Perhaps this installation is a
> prime candidate for a thermal switch!
>
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 7:13 PM
> To: Repeater-Builder@yahoogroups.com 
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices
>
> This is excellent Eric. I have an R1225 repeater in a GR500 case. There is
> a
> fan but it runs continuously. The duty cycle is low but because of the
> nature of
> the service there are times when it may be very high for extended periods
> of
> time.
> So most of the time the fan is not needed, but I want it there for those
> rare occasions.
> I don't recognize the part no. on the fan it looks remarkably similar to
> the
> one stock in
> GR500. This will work very well for me. Thanks.
>
> lh
>
> On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon 
> 
> <mailto:wb6...@verizon.net > > wrote:
>
>
>
> Larry,
>
> My first use of this thermal switch was on a solar-powered Motorola
> R1225
> UHF repeater at a commercial site. I simply drilled and tapped two
> 4-40
> holes on a flat portion of the outside fin, and mounted the thermal
> switch
> after applying some heat-conductive paste. I used a three-inch
> low-EMI
> Panasonic fan blowing right on the fins. This is a 45-watt repeater
> set for
> about 30 watts output. It went into service early in 2003, and has
> been
> trouble-free ever since. I have attached a picture of what it looks
> like.
>
> 73, Eric Lemmon WB6FLY
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
>
> [mailto:Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> ] On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 11:56 AM
> To: Repeater-Builder@yahoogroups.com 
> <mailto:Repeater-Builder%40yahoogroups.com>
>
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater
> devices
>
> Eric,
>
> This is good info. I have an immediate use for this. How have you
> actually
> attached this 'stat to the fin?
>
> Larry
>
> On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon 
> 
> <mailto:wb6fly%40verizon.net >
> <mailto:wb6...@verizon.net   wb6fly%40verizon.net > > > wrote:
>
>
>
> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with
> many
> potential uses. However, using it for fan control is not only
> expensive,
> but unnecessary.
>
> A fan blowing on a transmitter heat sink does absolutely nothing
> immediately
> after the transmitter is keyed, since the heat sink is likely at
> ambient
> temperature. It takes a period of time for the heat sink to warm up,
> so
> operating the fan prematurely is a waste of energy- which may be an
> issue
> for a solar-powered repeater.
>
> IMHO, the most efficient means of fan control is also the cheapest:
> A
> thermal switch. My first choice is a Cantherm #R2005015
> normally-open
> thermostat that closes at 50 degrees Celsius, about 122 degrees
> Fahrenheit.
> When attached to a heat-sink fin, it turns the fan on when
> necessary, and
> keeps it on until the heat sink cools below about 100 degrees F-
> around body
> temperature. This particular switch is available from Digi-Key for
> about
> $9, as Catalog Number 317-1094-ND.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
>
> <mailto:Repeater-Builder%40yahoogroups.com
> <mailto:Repeater-Builder%2540yahoogroups.com>
> >
> [mailto:Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
>
> <mailto:Repeater-Builder%40yahoogroups.com
> <mailto:Repeater-Builder%2540yahoogroups.com>
>

RE: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Eric Lemmon

Larry,

That's odd; both the GR1225 and RKR1225 repeaters I am familiar with, which
use the R1225 transceiver, have a small thermal switch that is wedged
between two of the heat-sink fins.  In both repeaters, the fan runs only
when the radio gets hot.  I am surprised that you have a repeater using the
R1225 in which the fan runs continuously.  Perhaps this installation is a
prime candidate for a thermal switch!

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Larry Horlick
Sent: Saturday, May 01, 2010 7:13 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices

  

This is excellent Eric. I have an R1225 repeater in a GR500 case. There is a
fan but it runs continuously. The duty cycle is low but because of the
nature of
the service there are times when it may be very high for extended periods of
time.
So most of the time the fan is not needed, but I want it there for those
rare occasions.
I don't recognize the part no. on the fan it looks remarkably similar to the
one stock in
GR500. This will work very well for me. Thanks.

lh

On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon mailto:wb6...@verizon.net> > wrote:


  

Larry,

My first use of this thermal switch was on a solar-powered Motorola
R1225
UHF repeater at a commercial site. I simply drilled and tapped two
4-40
holes on a flat portion of the outside fin, and mounted the thermal
switch
after applying some heat-conductive paste. I used a three-inch
low-EMI
Panasonic fan blowing right on the fins. This is a 45-watt repeater
set for
about 30 watts output. It went into service early in 2003, and has
been
trouble-free ever since. I have attached a picture of what it looks
like.

73, Eric Lemmon WB6FLY

-Original Message-
From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
[mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Larry Horlick
Sent: Saturday, May 01, 2010 11:56 AM
To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
    Subject: Re: [Repeater-Builder] Neat kit for switching repeater
devices

Eric,

This is good info. I have an immediate use for this. How have you
actually
attached this 'stat to the fin?

Larry

On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon mailto:wb6fly%40verizon.net> 
<mailto:wb6...@verizon.net <mailto:wb6fly%40verizon.net> > > wrote:



Scott,

I must agree that the CK1614 is an extremely versatile timer, with
many
potential uses. However, using it for fan control is not only
expensive,
but unnecessary.

A fan blowing on a transmitter heat sink does absolutely nothing
immediately
after the transmitter is keyed, since the heat sink is likely at
ambient
temperature. It takes a period of time for the heat sink to warm up,
so
operating the fan prematurely is a waste of energy- which may be an
issue
for a solar-powered repeater.

IMHO, the most efficient means of fan control is also the cheapest:
A
thermal switch. My first choice is a Cantherm #R2005015
normally-open
thermostat that closes at 50 degrees Celsius, about 122 degrees
Fahrenheit.
When attached to a heat-sink fin, it turns the fan on when
necessary, and
keeps it on until the heat sink cools below about 100 degrees F-
around body
temperature. This particular switch is available from Digi-Key for
about
$9, as Catalog Number 317-1094-ND.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com
<mailto:Repeater-Builder%2540yahoogroups.com> > 
[mailto:Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com
<mailto:Repeater-Builder%2540yahoogroups.com> > ] On Behalf Of na4it
Sent: Saturday, May 01, 2010 9:38 AM
To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
<mailto:Repeater-Builder%40yahoogroups.com
<mailto:Repeater-Builder%2540yahoogroups.com> > 
Subject: [Repeater-Builder] Neat kit for switching repeater devices

I have started using this little kit
(http://

RE: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Richard

It looks very professionally done. I use something similar, except that it
is glued to a heat sink fin.
 

Richard
www.n7tgb.net
The problem with socialism is that eventually you run out of other people's
money
--Margaret Thatcher


 

  _  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon
Sent: Saturday, May 01, 2010 5:29 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices


  

Larry,

My first use of this thermal switch was on a solar-powered Motorola R1225
UHF repeater at a commercial site. I simply drilled and tapped two 4-40
holes on a flat portion of the outside fin, and mounted the thermal switch
after applying some heat-conductive paste. I used a three-inch low-EMI
Panasonic fan blowing right on the fins. This is a 45-watt repeater set for
about 30 watts output. It went into service early in 2003, and has been
trouble-free ever since. I have attached a picture of what it looks like.

73, Eric Lemmon WB6FLY

-Original Message-
From: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com>
yahoogroups.com
[mailto:Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com>
yahoogroups.com] On Behalf Of Larry Horlick
Sent: Saturday, May 01, 2010 11:56 AM
To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com>
yahoogroups.com
Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices

Eric,

This is good info. I have an immediate use for this. How have you actually
attached this 'stat to the fin?

Larry

On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon mailto:wb6fly%40verizon.net> net
<mailto:wb6...@verizon. <mailto:wb6fly%40verizon.net> net> > wrote:



Scott,

I must agree that the CK1614 is an extremely versatile timer, with
many
potential uses. However, using it for fan control is not only
expensive,
but unnecessary.

A fan blowing on a transmitter heat sink does absolutely nothing
immediately
after the transmitter is keyed, since the heat sink is likely at
ambient
temperature. It takes a period of time for the heat sink to warm up,
so
operating the fan prematurely is a waste of energy- which may be an
issue
for a solar-powered repeater.

IMHO, the most efficient means of fan control is also the cheapest:
A
thermal switch. My first choice is a Cantherm #R2005015
normally-open
thermostat that closes at 50 degrees Celsius, about 122 degrees
Fahrenheit.
When attached to a heat-sink fin, it turns the fan on when
necessary, and
keeps it on until the heat sink cools below about 100 degrees F-
around body
temperature. This particular switch is available from Digi-Key for
about
$9, as Catalog Number 317-1094-ND.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com>
yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
[mailto:Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com>
yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of na4it
Sent: Saturday, May 01, 2010 9:38 AM
To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com>
yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> 
Subject: [Repeater-Builder] Neat kit for switching repeater devices

I have started using this little kit
(http://www.electron
<http://www.electronickits.com/kit/complete/elec/ck1614.htm>
ickits.com/kit/complete/elec/ck1614.htm
<http://www.electron
<http://www.electronickits.com/kit/complete/elec/ck1614.htm>
ickits.com/kit/complete/elec/ck1614.htm> 
<http://www.electron
<http://www.electronickits.com/kit/complete/elec/ck1614.htm>
ickits.com/kit/complete/elec/ck1614.htm
<http://www.electron
<http://www.electronickits.com/kit/complete/elec/ck1614.htm>
ickits.com/kit/complete/elec/ck1614.htm> > ) for fan
control on repeaters. I can also be used as a PTT and Time Out
circuit,
along with a lot of other uses.

Download the pdf on that site and check it out.

Scott NA4IT

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Larry Horlick

This is excellent Eric. I have an R1225 repeater in a GR500 case. There is a
fan but it runs continuously. The duty cycle is low but because of the
nature of
the service there are times when it may be very high for extended periods of
time.
So most of the time the fan is not needed, but I want it there for those
rare occasions.
I don't recognize the part no. on the fan it looks remarkably similar to the
one stock in
GR500. This will work very well for me. Thanks.

lh

On Sat, May 1, 2010 at 8:28 PM, Eric Lemmon  wrote:

>
>
> Larry,
>
> My first use of this thermal switch was on a solar-powered Motorola R1225
> UHF repeater at a commercial site. I simply drilled and tapped two 4-40
> holes on a flat portion of the outside fin, and mounted the thermal switch
> after applying some heat-conductive paste. I used a three-inch low-EMI
> Panasonic fan blowing right on the fins. This is a 45-watt repeater set for
> about 30 watts output. It went into service early in 2003, and has been
> trouble-free ever since. I have attached a picture of what it looks like.
>
> 73, Eric Lemmon WB6FLY
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of Larry Horlick
> Sent: Saturday, May 01, 2010 11:56 AM
> To: Repeater-Builder@yahoogroups.com 
> Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices
>
> Eric,
>
> This is good info. I have an immediate use for this. How have you actually
> attached this 'stat to the fin?
>
> Larry
>
> On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon 
> 
> <mailto:wb6...@verizon.net > > wrote:
>
>
>
> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with
> many
> potential uses. However, using it for fan control is not only
> expensive,
> but unnecessary.
>
> A fan blowing on a transmitter heat sink does absolutely nothing
> immediately
> after the transmitter is keyed, since the heat sink is likely at
> ambient
> temperature. It takes a period of time for the heat sink to warm up,
> so
> operating the fan prematurely is a waste of energy- which may be an
> issue
> for a solar-powered repeater.
>
> IMHO, the most efficient means of fan control is also the cheapest:
> A
> thermal switch. My first choice is a Cantherm #R2005015
> normally-open
> thermostat that closes at 50 degrees Celsius, about 122 degrees
> Fahrenheit.
> When attached to a heat-sink fin, it turns the fan on when
> necessary, and
> keeps it on until the heat sink cools below about 100 degrees F-
> around body
> temperature. This particular switch is available from Digi-Key for
> about
> $9, as Catalog Number 317-1094-ND.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
>
> [mailto:Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder%40yahoogroups.com>
> ] On Behalf Of na4it
> Sent: Saturday, May 01, 2010 9:38 AM
> To: Repeater-Builder@yahoogroups.com 
> <mailto:Repeater-Builder%40yahoogroups.com>
>
> Subject: [Repeater-Builder] Neat kit for switching repeater devices
>
> I have started using this little kit
> (http://www.electronickits.com/kit/complete/elec/ck1614.htm
> <http://www.electronickits.com/kit/complete/elec/ck1614.htm>
> <http://www.electronickits.com/kit/complete/elec/ck1614.htm
> <http://www.electronickits.com/kit/complete/elec/ck1614.htm> > ) for fan
> control on repeaters. I can also be used as a PTT and Time Out
> circuit,
> along with a lot of other uses.
>
> Download the pdf on that site and check it out.
>
> Scott NA4IT
>
>
>
>  
>

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Mike Dietrich

Hey Eric,
The circuit board to the right in your picture;
Is that the controller and if so, what brand and model ?

Tnx,
Mike   KB5FLX


  - Original Message - 
  From: Eric Lemmon 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Saturday, May 01, 2010 7:28 PM
  Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices



  Larry,

  My first use of this thermal switch was on a solar-powered Motorola R1225
  UHF repeater at a commercial site. I simply drilled and tapped two 4-40
  holes on a flat portion of the outside fin, and mounted the thermal switch
  after applying some heat-conductive paste. I used a three-inch low-EMI
  Panasonic fan blowing right on the fins. This is a 45-watt repeater set for
  about 30 watts output. It went into service early in 2003, and has been
  trouble-free ever since. I have attached a picture of what it looks like.

  73, Eric Lemmon WB6FLY

  -Original Message-
  From: Repeater-Builder@yahoogroups.com
  [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Larry Horlick
  Sent: Saturday, May 01, 2010 11:56 AM
  To: Repeater-Builder@yahoogroups.com
  Subject: Re: [Repeater-Builder] Neat kit for switching repeater devices

  Eric,

  This is good info. I have an immediate use for this. How have you actually
  attached this 'stat to the fin?

  Larry

  On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon mailto:wb6...@verizon.net> > wrote:



  Scott,

  I must agree that the CK1614 is an extremely versatile timer, with
  many
  potential uses. However, using it for fan control is not only
  expensive,
  but unnecessary.

  A fan blowing on a transmitter heat sink does absolutely nothing
  immediately
  after the transmitter is keyed, since the heat sink is likely at
  ambient
  temperature. It takes a period of time for the heat sink to warm up,
  so
  operating the fan prematurely is a waste of energy- which may be an
  issue
  for a solar-powered repeater.

  IMHO, the most efficient means of fan control is also the cheapest:
  A
  thermal switch. My first choice is a Cantherm #R2005015
  normally-open
  thermostat that closes at 50 degrees Celsius, about 122 degrees
  Fahrenheit.
  When attached to a heat-sink fin, it turns the fan on when
  necessary, and
  keeps it on until the heat sink cools below about 100 degrees F-
  around body
  temperature. This particular switch is available from Digi-Key for
  about
  $9, as Catalog Number 317-1094-ND.

  73, Eric Lemmon WB6FLY


  -Original Message-
  From: Repeater-Builder@yahoogroups.com
  <mailto:Repeater-Builder%40yahoogroups.com> 
  [mailto:Repeater-Builder@yahoogroups.com
  <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of na4it
  Sent: Saturday, May 01, 2010 9:38 AM
  To: Repeater-Builder@yahoogroups.com
  <mailto:Repeater-Builder%40yahoogroups.com> 
  Subject: [Repeater-Builder] Neat kit for switching repeater devices

  I have started using this little kit
  (http://www.electronickits.com/kit/complete/elec/ck1614.htm
  <http://www.electronickits.com/kit/complete/elec/ck1614.htm> 
  <http://www.electronickits.com/kit/complete/elec/ck1614.htm
  <http://www.electronickits.com/kit/complete/elec/ck1614.htm> > ) for fan
  control on repeaters. I can also be used as a PTT and Time Out
  circuit,
  along with a lot of other uses.

  Download the pdf on that site and check it out.

  Scott NA4IT

RE: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Kris Kirby

On Sat, 1 May 2010, Eric Lemmon wrote:
> A fan blowing on a transmitter heat sink does absolutely nothing 
> immediately after the transmitter is keyed, since the heat sink is 
> likely at ambient temperature.  It takes a period of time for the heat 
> sink to warm up, so operating the fan prematurely is a waste of 
> energy- which may be an issue for a solar-powered repeater.
> 
> IMHO, the most efficient means of fan control is also the cheapest:  
> A thermal switch.  My first choice is a Cantherm #R2005015 
> normally-open thermostat that closes at 50 degrees Celsius, about 122 
> degrees Fahrenheit. When attached to a heat-sink fin, it turns the fan 
> on when necessary, and keeps it on until the heat sink cools below 
> about 100 degrees F- around body temperature.  This particular switch 
> is available from Digi-Key for about $9, as Catalog Number 
> 317-1094-ND.

If you're going to be using solar power for the repeater, it might be 
just as wise to invest in metal -- more heatsink area and better 
heatsinking. Like, for instance, the head off of an old 
air-cooled Volkswagen. If you don't need a fan, and the temperature rise 
is acceptable

--
Kris Kirby, KE4AHR
Disinformation Analyst

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Kirk Just Kirk

I agree with Eric's assessment of the NOT running fans when not needed.
I do the same thing, slightly differant. I had some left over solid state
Waterbed thermostats. i wired them to switch around 109 degrees (they topped
out there).I wired them backwards to when the temp got to 109 they switched
on a SSR. fans would only start when needed. Saves the life of the
fans,filters and cuts down on the dirt inside the cabinet.
I am in the process of setting up a few PURC-5000/MSF5000 on 900Mhz and
440Mhz and they all will have this type of fan controller.The PURC has a set
of three fans in a rack mount.The heatsinks are MASSIVE in this beast, takes
a while for it to get warm.In "Normal" operation the fans will hardly run,
especially if they are in a cold mountaintop site

Kirk

On Sat, May 1, 2010 at 11:36 AM, Eric Lemmon  wrote:

>
>
> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with many
> potential uses. However, using it for fan control is not only expensive,
> but unnecessary.
>
> A fan blowing on a transmitter heat sink does absolutely nothing
> immediately
> after the transmitter is keyed, since the heat sink is likely at ambient
> temperature. It takes a period of time for the heat sink to warm up, so
> operating the fan prematurely is a waste of energy- which may be an issue
> for a solar-powered repeater.
>
> IMHO, the most efficient means of fan control is also the cheapest: A
> thermal switch. My first choice is a Cantherm #R2005015 normally-open
> thermostat that closes at 50 degrees Celsius, about 122 degrees Fahrenheit.
> When attached to a heat-sink fin, it turns the fan on when necessary, and
> keeps it on until the heat sink cools below about 100 degrees F- around
> body
> temperature. This particular switch is available from Digi-Key for about
> $9, as Catalog Number 317-1094-ND.
>
> 73, Eric Lemmon WB6FLY
>
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of na4it
> Sent: Saturday, May 01, 2010 9:38 AM
> To: Repeater-Builder@yahoogroups.com 
> Subject: [Repeater-Builder] Neat kit for switching repeater devices
>
> I have started using this little kit
> (http://www.electronickits.com/kit/complete/elec/ck1614.htm
>  ) for fan
> control on repeaters. I can also be used as a PTT and Time Out circuit,
> along with a lot of other uses.
>
> Download the pdf on that site and check it out.
>
> Scott NA4IT
>
>  
>

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Larry Horlick

Eric,

This is good info. I have an immediate use for this. How have you actually
attached this 'stat to the fin?

Larry


On Sat, May 1, 2010 at 2:36 PM, Eric Lemmon  wrote:

>
>
> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with many
> potential uses. However, using it for fan control is not only expensive,
> but unnecessary.
>
> A fan blowing on a transmitter heat sink does absolutely nothing
> immediately
> after the transmitter is keyed, since the heat sink is likely at ambient
> temperature. It takes a period of time for the heat sink to warm up, so
> operating the fan prematurely is a waste of energy- which may be an issue
> for a solar-powered repeater.
>
> IMHO, the most efficient means of fan control is also the cheapest: A
> thermal switch. My first choice is a Cantherm #R2005015 normally-open
> thermostat that closes at 50 degrees Celsius, about 122 degrees Fahrenheit.
> When attached to a heat-sink fin, it turns the fan on when necessary, and
> keeps it on until the heat sink cools below about 100 degrees F- around
> body
> temperature. This particular switch is available from Digi-Key for about
> $9, as Catalog Number 317-1094-ND.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of na4it
> Sent: Saturday, May 01, 2010 9:38 AM
> To: Repeater-Builder@yahoogroups.com 
> Subject: [Repeater-Builder] Neat kit for switching repeater devices
>
> I have started using this little kit
> (http://www.electronickits.com/kit/complete/elec/ck1614.htm
>  ) for fan
> control on repeaters. I can also be used as a PTT and Time Out circuit,
> along with a lot of other uses.
>
> Download the pdf on that site and check it out.
>
> Scott NA4IT
>
>  
>

Re: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Chuck Kelsey

I agree that timers for fans are a waste of time, effort and money.

If you can stand a little waste of power, I like to simply key the fan with 
a relay driven by PTT. Sure, it starts the fan before it's needed, but to me 
it's no big deal. Once the repeater stops transmitting, so does the source 
of heat - it won't get hotter, but will cool down slowly on it's own (just 
like turning the burner of your stove off - the pan starts to cool right 
away).

Chuck
WB2EDV



- Original Message - 
From: "Eric Lemmon" 
To: 
Sent: Saturday, May 01, 2010 2:36 PM
Subject: RE: [Repeater-Builder] Neat kit for switching repeater devices


> Scott,
>
> I must agree that the CK1614 is an extremely versatile timer, with many
> potential uses.  However, using it for fan control is not only expensive,
> but unnecessary.
>
> A fan blowing on a transmitter heat sink does absolutely nothing 
> immediately
> after the transmitter is keyed, since the heat sink is likely at ambient
> temperature.  It takes a period of time for the heat sink to warm up, so
> operating the fan prematurely is a waste of energy- which may be an issue
> for a solar-powered repeater.
>
> IMHO, the most efficient means of fan control is also the cheapest:  A
> thermal switch.  My first choice is a Cantherm #R2005015 normally-open
> thermostat that closes at 50 degrees Celsius, about 122 degrees 
> Fahrenheit.
> When attached to a heat-sink fin, it turns the fan on when necessary, and
> keeps it on until the heat sink cools below about 100 degrees F- around 
> body
> temperature.  This particular switch is available from Digi-Key for about
> $9, as Catalog Number 317-1094-ND.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of na4it
> Sent: Saturday, May 01, 2010 9:38 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Neat kit for switching repeater devices
>
>
>
> I have started using this little kit
> (http://www.electronickits.com/kit/complete/elec/ck1614.htm
> <http://www.electronickits.com/kit/complete/elec/ck1614.htm> ) for fan
> control on repeaters. I can also be used as a PTT and Time Out circuit,
> along with a lot of other uses.
>
> Download the pdf on that site and check it out.
>
> Scott NA4IT
>
>
>
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>






No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.814 / Virus Database: 271.1.1/2847 - Release Date: 05/01/10 
02:27:00

RE: [Repeater-Builder] Neat kit for switching repeater devices

2010-05-01 Thread Eric Lemmon

Scott,

I must agree that the CK1614 is an extremely versatile timer, with many
potential uses.  However, using it for fan control is not only expensive,
but unnecessary.

A fan blowing on a transmitter heat sink does absolutely nothing immediately
after the transmitter is keyed, since the heat sink is likely at ambient
temperature.  It takes a period of time for the heat sink to warm up, so
operating the fan prematurely is a waste of energy- which may be an issue
for a solar-powered repeater.

IMHO, the most efficient means of fan control is also the cheapest:  A
thermal switch.  My first choice is a Cantherm #R2005015 normally-open
thermostat that closes at 50 degrees Celsius, about 122 degrees Fahrenheit.
When attached to a heat-sink fin, it turns the fan on when necessary, and
keeps it on until the heat sink cools below about 100 degrees F- around body
temperature.  This particular switch is available from Digi-Key for about
$9, as Catalog Number 317-1094-ND.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of na4it
Sent: Saturday, May 01, 2010 9:38 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Neat kit for switching repeater devices

  

I have started using this little kit
(http://www.electronickits.com/kit/complete/elec/ck1614.htm
 ) for fan
control on repeaters. I can also be used as a PTT and Time Out circuit,
along with a lot of other uses.

Download the pdf on that site and check it out.

Scott NA4IT

RE: [Repeater-Builder] Neat kit for switching repeater devices

RE: [Repeater-Builder] Neat kit for switching repeater devices

RE: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

RE: [Repeater-Builder] Neat kit for switching repeater devices

RE: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

RE: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

Re: [Repeater-Builder] Neat kit for switching repeater devices

RE: [Repeater-Builder] Neat kit for switching repeater devices

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