[Repeater-Builder] db224 Down Tilt

[Bob - AF6D]

Is it possible to order a new db224 with a down tilt harness? I've only found 
one other open dipole with down tilt and at three times the price. I run a high 
elevation repeater and we need to contour down below us.

[Repeater-Builder] Re: Building a notch duplexer with notch cans.

[skipp025]

My question to you is... do you think the cavities have 
enough Q so they might be configured for a 500 KHz split 
duplexer without excessive loss?  
s. 

> "kd4wov"  wrote:
>
> Hello All,
>   I am building a duplexer for use on 150.125 tx and 150.625 rx. this ia for 
> a mars machine. Yes i know this is a tough squeeze but this is what got 
> allocated to us for now.
>   i currently have 9 notch cans and 4 pass cans available. the machine 
> originally had 4 pass cans and a split of over 4 Mhz. When i measured the 
> system it has about 30db rejection with 4 pass cans. I think it would be best 
> to set the pass cans aside and go with notch cans, i could be wrong.
> 
> I have come to the point where we are getting things ready to build. As far 
> as i can tell playing with the cans using oddball length cables (i know it 
> will not be accurate, but it was a test) i need at least 3 notches on each 
> side to make it work at an acceptable level. 
> 
> my 2 questions is :
> 
> 1) what should be my cable lengths between cans.
> 
> 2) what should my cable length between the cans and the antenna tee?
>

Re: [Repeater-Builder] Re: Was Repeater Battery Question

[rrath]

Yes , and it cuts out at 11.4 and 
comes back up at 12.6 volts.

Rod

[Repeater-Builder] Re: Was Repeater Battery Question

[skipp025]

Do you have a low voltage disconnect on the system? 

s. 

> "rrath"  wrote:
>
> I would like to thank all of you that 
> replied. I asked the question because 
> I thought the batteries they were bad. 
> After removing from the site, I 
> charged them both up and took them 
> to two battery shop here in Yakima. 
> The results were, they are still good. 
> So now I need to track down why the 
> system keeps going down. They are 
> 5 years old, but the repeater get very 
> little use; maybe two hrs per week 
> during the winter and about 6 hrs per 
> week during the summer. Thank you 
> all.
> 
> Rod kc7vqr
>

[Repeater-Builder] Mastr II Executive Repeater Inquiry

[N2OBS]

Has anyone successfully interfaced any device with this type of repeater?  I 
have a nicely modified mobile transceiver masterfully by Ron N9EE and without 
letting the magic smoke out would like to interface it with either irlp or 
echolink using a ultimate linking interface (ULI).  I need assistance in this 
interface project.  73 de N2OBS.

[Repeater-Builder] Was Repeater Battery Question

[rrath]

I would like to thank all of you that 
replied. I asked the question because 
I thought the batteries they were bad. 
After removing from the site, I 
charged them both up and took them 
to two battery shop here in Yakima. 
The results were, they are still good. 
So now I need to track down why the 
system keeps going down. They are 
5 years old, but the repeater get very 
little use; maybe two hrs per week 
during the winter and about 6 hrs per 
week during the summer. Thank you 
all.

Rod kc7vqr

Re: [Repeater-Builder] XLINK BT, Blue Tooth for Cell Phone Connection to Repeaters at the site

[gerald bishop]

Your coment on the "deer in the headlight " reminds me of my resent trip the 
the local Rat Shack ! Asked if they had any light bulbs,panel lamps,indicator 
lamps,Told "don't know what you mean???"" HI, De Jerry 

--- On Sat, 1/23/10, bbe...@aol.com  wrote:

From: bbe...@aol.com 
Subject: [Repeater-Builder] XLINK BT,  Blue Tooth for Cell Phone Connection to 
Repeaters at the site
To: eric...@telus.net, jfalbri...@verizon.net, Repeater-Builder@yahoogroups.com
Date: Saturday, January 23, 2010, 1:38 PM







 



  



  
  
  


 
Hi Eric, John and the Group!
 
Saw you post about the Xlink BT.  Neat Idea! I never thought of Blue 
Tooth.  I picked up one of these little guys on Ebay last week and started 
to experiment with it.  Seems kind of nice.  It should work out, 
.. Any suggestions so I do not reinvent the wheel?
 
Like John, WA3ZGL said in his post, My Club is trying to cut club 
costs and the repeater phone line is too high because we have to pay commercial 
rates. More than $40 a month (taxes eat up almost half!!) Trust me, I have 
tried 
to get this changed, no luck!  We want to use it for repeater control and 
autopatch.  Yes, some guys still use it, I think it was also the same guys 
that didn't want PL in their radio too! (only joking, Flame suit 
ON!!)  I have a family plan phone service, so the extra cell is about $15 
after taxes.  That should save the Club around $ 300 a yr.
 
Over the years I have tried to explain to cell carriers what I wanted to 
do, I told them I had a fax machine at a job site trailer without phone 
service and wanted to hook it up to my cell phone. It was an easy 
explanation, try explaining a wide coverage repeater and a repeater 
controller!! 
(Hi Hi)  All I get was that "deer in the headlight stare" from those 18 
year old kids and when they bring out the old timer expert (maybe 25-ish, 
same thing) .. when did we become middle aged?
 
Anyway, any special ideas or suggestions on using this little guy?  

 
Anyway great post!  
 
73, Brian WD9HSY 
 
Flame suit on!  I insulted Hams without PL, still use autopatch, don't 
have control receivers, people under 30, all of us middle age guys, deer, and 
fax machines! (HI HI) Taxman?



 





 



  






  

[Repeater-Builder] Re: Building a notch duplexer with notch cans.

[kd4wov]

these are db 4140 notch cans. the origional connecting cables are 4" from 
connector to connector, which gives 6" from center of tee to center of tee. 
they are from a VHF 155/154 mhz range.


--- In Repeater-Builder@yahoogroups.com, "kd4wov"  wrote:
>
> Hello All,
>   I am building a duplexer for use on 150.125 tx and 150.625 rx. this ia for 
> a mars machine. Yes i know this is a tough squeeze but this is what got 
> allocated to us for now.
>   i currently have 9 notch cans and 4 pass cans available. the machine 
> originally had 4 pass cans and a split of over 4 Mhz. When i measured the 
> system it has about 30db rejection with 4 pass cans. I think it would be best 
> to set the pass cans aside and go with notch cans, i could be wrong.
> 
> I have come to the point where we are getting things ready to build. As far 
> as i can tell playing with the cans using oddball length cables (i know it 
> will not be accurate, but it was a test) i need at least 3 notches on each 
> side to make it work at an acceptable level. 
> 
> my 2 questions is :
> 
> 1) what should be my cable lengths between cans.
> 
> 2) what should my cable length between the cans and the antenna tee?
>

[Repeater-Builder] Re: Was Repeater Battery Question

[k5oo]

I have a solar charged / battery powered 2 meter repeater that has been on for 
about 10 years. I have tried Trojan T105s, Everstart deep-cycles, and now I 
have an old "absorbed glass mat" Liberty 100. By far, the Liberty standby power 
type battery will outlast the others hands down. It will survive the hard 
cycling that a ham repeater will be subjected. They are very expensive. I think 
a new one is around $350 for a 120AH 12 V but the one I have came out of a 
substation backup after it was replaced. I think they call these types AGSM or 
AGM types. They are valve regulated, maintenance free, and will last for a 
very, very long time. You might find them used and available just for the 
asking around telco buldings, substations, hospitals, and the likes. I run 75 
watts charging with a charge coltroller and the repeater is the heaviest used 
machine around this part of the state. Hence, I have not gotten anything to 
live much over 2.5-3 years except for the old "worn out" battery that I 
mentioned. Actually, I just installed it as a temporary when I had the deep 
cycle battery cell die just to be used until I could get to the store and buy a 
new one. Well that was years ago and it has survived long cloudy winter spells 
just fine so it has just stayed there like the energized bunny.

[Repeater-Builder] Re: Was Repeater Battery Question

[k5oo]

I have a solar charged / battery powered 2 meter repeater that has been on for 
about 10 years. I have tried Trojan T105s, Everstart deep-cycles, and now I 
have an old "absorbed glass mat" Liberty 100. By far, the Liberty standby power 
type battery will outlast the others hands down. It will survive the hard 
cycling that a ham repeater will be subjected. They are very expensive. I think 
a new one is around $350 for a 120AH 12 V but the one I have came out of a 
substation backup after it was replaced. I think they call these types AGSM or 
AGM types. They are valve regulated, maintenance free, and will last for a 
very, very long time. You might find them used and available just for the 
asking around telco buldings, substations, hospitals, and the likes. I run 75 
watts charging with a charge coltroller and the repeater is the heaviest used 
machine around this part of the state. Hence, I have not gotten anything to 
live much over 2.5-3 years except for the old "worn out" battery that I 
mentioned. Actually, I just installed it as a temporary when I had the deep 
cycle battery cell die just to be used until I could get to the store and buy a 
new one. Well that was years ago and it has survived long cloudy winter spells 
just fine so it has just stayed there like the energized bunny.

[Repeater-Builder] Building a notch duplexer with notch cans.

[kd4wov]

Hello All,
  I am building a duplexer for use on 150.125 tx and 150.625 rx. this ia for a 
mars machine. Yes i know this is a tough squeeze but this is what got allocated 
to us for now.
  i currently have 9 notch cans and 4 pass cans available. the machine 
originally had 4 pass cans and a split of over 4 Mhz. When i measured the 
system it has about 30db rejection with 4 pass cans. I think it would be best 
to set the pass cans aside and go with notch cans, i could be wrong.

I have come to the point where we are getting things ready to build. As far as 
i can tell playing with the cans using oddball length cables (i know it will 
not be accurate, but it was a test) i need at least 3 notches on each side to 
make it work at an acceptable level. 

my 2 questions is :

1) what should be my cable lengths between cans.

2) what should my cable length between the cans and the antenna tee?

RE: [Repeater-Builder] Re: XLINK BT, Blue Tooth for Cell Phone Connection to Repeaters at the site

[Andrew Seybold]

I have one that was on Sprint, would need to be activated and will probably 
only work on Sprint but will sell it for $25 plus shipping.

 

Andy W6AMS

 

From: Repeater-Builder@yahoogroups.com 
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of rahwayflynn
Sent: Saturday, January 23, 2010 11:05 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: XLINK BT, Blue Tooth for Cell Phone Connection 
to Repeaters at the site

 

  

Brian,
If you can find one: Telular http://www.telular.com/terminals.asp RJ-11 
connector, and provides precision dial tone and supervision.

--- In Repeater-Builder@yahoogroups.com 
 , bbe...@... wrote:
>
> 
> Hi Eric, John and the Group!
> 
> Saw you post about the Xlink BT. Neat Idea! I never thought of Blue 
> Tooth. I picked up one of these little guys on Ebay last week and started to 
> experiment with it. Seems kind of nice. It should work out, .. Any 
> suggestions so I do not reinvent the wheel?
> 
> Anyway great post! 
> 
> 73, Brian WD9HSY 
>
>

[Repeater-Builder] Yeasu FTR-5410

[Mike in Joliet]

I am working toward getting this old beast up on the UHF ham band and am 
looking for someone that has familiarity with them.  I need a bit of advice on 
a couple of things.

In no certain order:

1. interfacing it to an ICS controller.  I want to bypass the internal 
controller and ID unit and just use my own.

2.  I plan to use an old Micor PA.  They have a drive requirement of only 1.5-2 
watts.  Can I just plug it directly into the exciter and leave the 10w amp 
section float?  Or is there enough adjustment on the pot to get it down that 
low?

3.  Is the "ptt drive"  the same thing as the PTT?  What I mean is, if I tied 
that line to the PTT on the ICS controller, is that correct?

I have the manual from the main site.  Just looking to find some advice from 
someone that has done this before.

Michael Dinger
W9PXZ

[Repeater-Builder] Re: Hamtronics COR-3 to TS-64

[skipp025]

> "na4it"  wrote:
> I am in need of help in adding a TS-64 tone board to a 
> Hamtronics COR-3. 

Depends on what you're expecting the TS-64 board to do 
for you.  If you want to use the tone filter the input 
connection point is kind of limited to the receiver 
discriminator circuit. If you only want the decoder portion 
of the TS-64, then things are a bit less cumbersome. 

Internal (on the board) to the TS-64 the tone voice high-
pass audio filter input and the decoder inputs are tied 
together, which in my opinion really limits the boards 
potential for use in other more straight forward 
applications. Comm Spec assumed everyone would want to 
drive the voice high-pass audio CTCSS filter from the 
discriminator, which is really silly. When forced, I have 
to separate the filter out by doing pain in the fanny 
surface mount de-soldering and re-routing of Capacitor C12 
(to a separate connection point). 

If you are using the receiver discriminator as your main 
or only audio source then I guess all would be well... 
except the Voice Audio High-pass Filter is not muted. 

Normally, when using the earlier TS-32, the Voice Audio 
high-pass filter would connect to an internal receiver 
location like the high-side of a volume control (pot). 

You'd have to look at the receiver diagram to see where 
the receiver audio is de-emphasized and hopefully muted 
off. Some receivers don't mute the low-level audio 
circuit... relying on speaker audio gating (on/off) 
with tricks like an enable line to the audio power 
amplifier section, well after the volume control (pot). 

And most modern commercial radio receivers have a CTCSS 
filter capacity available so you have to know where that 
filter is if installed in the path. 

So a TS-32 properly connected would provide you with gated 
(on/off) voice audio, de-emphasized and no CTCSS passing 
through.  You would apply that audio filter output direct 
to your Hamtronics COR-3 Input Pin. If all the mentioned 
conditions aren't met, the audio to the COR 3 might not 
result in what you want on the COR-3 output. 

In the case of your TS-64, if you can't separate the Audio 
Voice filter then you need to figure out if you really 
want to use it with your specific layout. You can use the 
CTCSS decoder and not the voice audio filter, maybe relying on 
the radios internal CTCSS Filter and gating (on/off) at 
certain connection points. Another way to obtain voice 
audio "trick" is to terminate the speaker audio into a 22 or 
27 ohm 5-watt resistor and tap across the resistor for 
repeater audio... knowing the speaker audio doesn't have 
CTCSS and is normally muted with no signal. Caution is 
advised using this method to ensure you only couple the 
AC (and not any floating DC Voltage) from the audio 
amplifier output circuit. 

If you have no problem dealing with the un-muted discriminator 
voice audio from the TS-64 then go for it... but I'm fairly sure 
the COR-3 doesn't have that sort of audio input mute function 
included. 

> It is connected to 2 Mitreks, with COS and PTT both positive 
> voltage for action.

There are a lot of different mods and connection points possible 
in the Mitrek, so we'd have to know a bit more about how the 
radios are connected. I've seen three or four different Mitrek 
Conversions posted at various web sites and all are different 
variations... 

Don't be scarred by active high or active low TX keying or COS. 
It only takes a simple (properly connected) fet or transistor 
circuit to invert the logic to the converse. 

> Anyone have a diagram or point to point description? 
> de NA4IT

Probably not without first making some choices based on 
your current connections. But then a diagram or connection 
information table is possible. 

s. 

[Repeater-Builder] Re: XLINK BT, Blue Tooth for Cell Phone Connection to Repeaters at the site

[rahwayflynn]

Brian,
If you can find one:  Telular http://www.telular.com/terminals.asp  RJ-11 
connector, and provides precision dial tone and supervision.

--- In Repeater-Builder@yahoogroups.com, bbe...@... wrote:
>
> 
> Hi Eric, John and the Group!
>  
> Saw you post about the Xlink BT.  Neat Idea! I never thought of Blue  
> Tooth.  I picked up one of these little guys on Ebay last week and started  
> to 
> experiment with it.  Seems kind of nice.  It should work out,  .. Any 
> suggestions so I do not reinvent the wheel?
>  
> Anyway great post!  
>  
> 73, Brian WD9HSY 
>
>

[Repeater-Builder] XLINK BT, Blue Tooth for Cell Phone Connection to Repeaters at the site

[bbedoe]

Hi Eric, John and the Group!
 
Saw you post about the Xlink BT.  Neat Idea! I never thought of Blue  
Tooth.  I picked up one of these little guys on Ebay last week and started  to 
experiment with it.  Seems kind of nice.  It should work out,  .. Any 
suggestions so I do not reinvent the wheel?
 
Like John, WA3ZGL said in his post, My Club is trying to cut club  costs 
and the repeater phone line is too high because we have to pay commercial  
rates. More than $40 a month (taxes eat up almost half!!) Trust me, I have 
tried  to get this changed, no luck!  We want to use it for repeater control 
and 
 autopatch.  Yes, some guys still use it, I think it was also the same guys 
 that didn't want PL in their radio too! (only joking, Flame suit  ON!!)  I 
have a family plan phone service, so the extra cell is about $15  after 
taxes.  That should save the Club around $ 300 a yr.
 
Over the years I have tried to explain to cell carriers what I wanted to  
do, I told them I had a fax machine at a job site trailer without phone  
service and wanted to hook it up to my cell phone. It was an easy  explanation, 
try explaining a wide coverage repeater and a repeater controller!!  (Hi Hi) 
 All I get was that "deer in the headlight stare" from those 18  year old 
kids and when they bring out the old timer expert (maybe 25-ish,  same thing) 
.. when did we become middle aged?
 
Anyway, any special ideas or suggestions on using this little guy?  
 
Anyway great post!  
 
73, Brian WD9HSY 
 
Flame suit on!  I insulted Hams without PL, still use autopatch, don't  
have control receivers, people under 30, all of us middle age guys, deer, and  
fax machines! (HI HI) Taxman?

[Repeater-Builder] Re: Hamtronics COR-3 to TS-64

[cracked]

I add on a tiny transistor inverter circuit in these situations.   See
the diagram at the bottom of this page:

http://www.kpsec.freeuk.com/trancirc.htm
<%20http://www.kpsec.freeuk.com/trancirc.htm>

If your available +Vs is too much for the COR-3 board, omit Rc and feed
the collector from the center of a voltage divider instead.  Assuming
Vs=13.8V, you can get about 7V from the junction of two 1k-ohm
resistors, which should be a good spot for the +3 to +10V input on the
COR-3.

(You can get more inputs by adding transistors with their collectors
tied together and emitters tied to ground.)

James K7ICU

--- In Repeater-Builder@yahoogroups.com, "na4it"  wrote:
>
> Anyone have a diagram or point to point description for connecting a
TS64 tone board (encode and decode) to a Hamtronics COR-3 board? I'm
dealing with one feeding two Mitreks, with + voltage on PTT and COR, and
I am stumped.
>
> de NA4IT
>

[Repeater-Builder] Motorola GM338 software

[Benjamin L. Naber]

Hello everyone-

anyone on here have the programming software for the Motorola GM338? The
ones I have are the 403-470MHz 1-25W version.

please reply off list, or give me a call regarding arrangements:
678-828-4011 ext 820

~Benjamin, KB9LFZ

Re: [Repeater-Builder] GE Mastr II 800 Mhz Repeater for Sale

[Eric M.]

I posted this a few weeks ago with the hope that someone might be 
interested in it as a package and that unfortunately didn't happen.


Is anyone interested in any pieces of this repeater or know of anyone 
who is interested in it?  If so, please contact me off list.


Any money from the sale of this will be donated to our local radio club 
here that I am a member of.


Thanks for looking.
Eric
VA3EAM
(va3eam at sympatico dot ca)


Eric M. wrote:

 



I have a GE Mastr II 5 Channel 800Mhz Repeater system for sale. From
what I understand this is a trunked system.

It consists of the following items;

5 - S1NZYY100M Chassis's - I think these are all 100 watt PA's.
5 - PLI9D430272G7 Power supplies (Model number might be PL19D430272G7)
1 - Sinclair TJ4235 5 Channel Dual Stage Isolator
(http://www.sinctech.com/catalog/product.aspx?id=897 
)

1 - Sinclair P4440E Duplexer
(http://www.sinctech.com/catalog/product.aspx?id=1157 
)

1 - Sinclair SRI410C4 Antenna (I think that is the model number, it is a
little worn)

I would prefer to sell this as an entire lot.

Serious inquiries and reasonable offers only please. The system is
located in Oshawa, Ontario, Canada. You can come and pick it up or if
the offer is reasonable enough I will consider delivering it if it is
within a reasonable driving distance. I will also consider meeting
someone on the Canadian side of the border here in Ontario for pickup.

If you have any questions, please email me off list and we can go from
there.

Eric.
VA3EAM.

[Repeater-Builder] Re: Sinclair Duplexer

[dacrise16260]

Thanks Steve, that is what I needed.
Dave

--- In Repeater-Builder@yahoogroups.com, "Steven M Hodell"  wrote:
>
> How about this link???
> 
> http://www.repeater-builder.com/sinclair/q202-208-218-tuning.pdf
> 
> - Original Message - 
>   From: dacrise16260 
>   To: Repeater-Builder@yahoogroups.com 
>   Sent: Saturday, January 23, 2010 6:30 AM
>   Subject: [Repeater-Builder] Re: Sinclair Duplexer
> 
>   Thanks Steve, tried that already. These have 4 stubs in the harness and a 
> large loop of cable also. The link you suggested doesn't describe that. Also 
> tried Sinclair site with no help.
>   Dave
>   --- In Repeater-Builder@yahoogroups.com, "Steven M Hodell"  wrote:
>   >
>   > Try this link:
>   > 
>   > http://www.repeater-builder.com/sinclair/cm-1008.pdf
>   > 
>   > - Original Message - 
>   > From: dacrise16260 
>   > To: Repeater-Builder@yahoogroups.com 
>   > Sent: Saturday, January 23, 2010 6:12 AM
>   > Subject: [Repeater-Builder] Sinclair Duplexer
>   > 
>   > 
>   > 
>   > Hi all, I am in need of tuning instructions for Sinclair F-201GR 
> duplexers. I am told they are hybrid ring. They have 4 aluminum tubes with 
> plastic rods in them, along with the cavities. Thanks in advance.
>   > Dave
>   >
>

Re: [Repeater-Builder] Re: Sinclair Duplexer

[Steven M Hodell]

How about this link???

http://www.repeater-builder.com/sinclair/q202-208-218-tuning.pdf

- Original Message - 
  From: dacrise16260 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Saturday, January 23, 2010 6:30 AM
  Subject: [Repeater-Builder] Re: Sinclair Duplexer

  Thanks Steve, tried that already. These have 4 stubs in the harness and a 
large loop of cable also. The link you suggested doesn't describe that. Also 
tried Sinclair site with no help.
  Dave
  --- In Repeater-Builder@yahoogroups.com, "Steven M Hodell"  wrote:
  >
  > Try this link:
  > 
  > http://www.repeater-builder.com/sinclair/cm-1008.pdf
  > 
  > - Original Message - 
  > From: dacrise16260 
  > To: Repeater-Builder@yahoogroups.com 
  > Sent: Saturday, January 23, 2010 6:12 AM
  > Subject: [Repeater-Builder] Sinclair Duplexer
  > 
  > 
  > 
  > Hi all, I am in need of tuning instructions for Sinclair F-201GR duplexers. 
I am told they are hybrid ring. They have 4 aluminum tubes with plastic rods in 
them, along with the cavities. Thanks in advance.
  > Dave
  >
   

[Repeater-Builder] Re: Sinclair Duplexer

[dacrise16260]

Thanks Steve, tried that already. These have 4 stubs in the harness and a large 
loop of cable also. The link you suggested doesn't describe that. Also tried 
Sinclair site with no help.
Dave
--- In Repeater-Builder@yahoogroups.com, "Steven M Hodell"  wrote:
>
> Try this link:
> 
> http://www.repeater-builder.com/sinclair/cm-1008.pdf
> 
> 
> 
>   - Original Message - 
>   From: dacrise16260 
>   To: Repeater-Builder@yahoogroups.com 
>   Sent: Saturday, January 23, 2010 6:12 AM
>   Subject: [Repeater-Builder] Sinclair Duplexer
> 
> 
> 
>   Hi all, I am in need of tuning instructions for Sinclair F-201GR duplexers. 
> I am told they are hybrid ring. They have 4 aluminum tubes with plastic rods 
> in them, along with the cavities. Thanks in advance.
>   Dave
>

Re: [Repeater-Builder] Sinclair Duplexer

[Steven M Hodell]

Try this link:

http://www.repeater-builder.com/sinclair/cm-1008.pdf



  - Original Message - 
  From: dacrise16260 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Saturday, January 23, 2010 6:12 AM
  Subject: [Repeater-Builder] Sinclair Duplexer



  Hi all, I am in need of tuning instructions for Sinclair F-201GR duplexers. I 
am told they are hybrid ring. They have 4 aluminum tubes with plastic rods in 
them, along with the cavities. Thanks in advance.
  Dave



  

[Repeater-Builder] Sinclair Duplexer

[dacrise16260]

Hi all, I am in need of tuning instructions for Sinclair F-201GR duplexers. I 
am told they are hybrid ring. They have 4 aluminum tubes with plastic rods in 
them, along with the cavities. Thanks in advance.
Dave