Thanks all for your interest!
I have a buyer and a backup. I wish I had a few of these.
--
*73, Mark, K4SO
*www.k4so.com
picasaweb.google.com/kfourso
picasaweb.google.com/kfourso2
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Looking for a top cover for a ac-4 supply. Cosmetics not important.
73
dale wt4t
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Hi All,
I am looking to purchase an AC-4 power supply with the AC-4R upgrade kit
installed for a Drake station I am putting together.
Please call (567) 203-9327 or email.
Thanks,
Jeff W8CQ
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Got it...
Thanks,
Bill, WB9CAC
From: Bill Ellis wb9...@yahoo.com
To: Drakelist (Post) drakelist@zerobeat.net
Sent: Saturday, May 25, 2013 8:01 PM
Subject: [Drakelist] AC-4 Power Supply
Does anyone have a voltage chart for the AC-4 by pin on the power
Does anyone have a voltage chart for the AC-4 by pin on the power supply female
connector?
Thanks,
Bill Ellis, WB9CAC___
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Hi folks,
I've sent out info to half a dozen folks, and the idea of having a load
test has come up more than once. Chris, W7JPG, was the most
inquisitive, I've cc'd his note below, and my thoughts on the whole thing.
---
my reply:
Hi Chris,
You're right in everything you
I would be very interested in seeing the schematic..
73
Gene K1NR
PS I would not mind having one to check my Collins supply
either : - )
On Mon, 26 Nov 2012 11:50:11 -0500
Al Parker anc...@ec.rr.com wrote:
hi folks,
Some yrs ago there was an article on building a test
setup for
There wouldn't be much too it.
all you need would be a hand full of resistors, using ohm's law to calculate
the values. The values would be calculated at the max current the TRx series
would draw.
On would need to load the 6.3 v filament down to the same current as the tubes,
if you don't
Hi folks,
I have scanned the article, one small page, written by K0ZQD in V2 Iss.
16 of The Collins Coll's. MMag. It gives the schematic, leaving
construction details to the builder. I also have scanned a skem of the
p.s. pinouts for the 516F-2, from the same issue. Make your own
That would be a useful test jig.
John N. Hudson III, Communications Coordinator
4050 Taylor St, MS 243
San Diego, CA 92110
6192509063 Cell
On Nov 24, 2012, at 1:37 PM, Eugene Balinski euge...@nni.com wrote:
All,
Just wondering if anyone has put together an AC-4 load
or test bank ?
hi folks,
Some yrs ago there was an article on building a test setup for Collins
p.s.'s. I think it was in one of the Collins collector magazines, I can
search it out. I came into possession of one of the units, and have
made cable adapters for the AC-3/4's, and I think the HP-23's also.
All,
Just wondering if anyone has put together an AC-4 load
or test bank ? If so, could you share the plans ?
I would like something that would allow one to connect the
AC-4. switch on the AC, and measure the various voltage
levels on test point, and perhaps even load the supply.
Thanks
Gartman ; DrakeList Zerobeat
Sent: Friday, January 20, 2012 8:02 PM
Subject: Re: [Drakelist] AC-4
A number of years ago I bought about four AC4's, and installed 3-prong
computer cords, with the ground attached to the AC4 chassis. I used the
original strain relief, but carefully cut some
...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Mark Nace
Sent: Friday, January 20, 2012 9:03 PM
To: Gary Poland; John Gartman; DrakeList Zerobeat
Subject: Re: [Drakelist] AC-4
A number of years ago I bought about four AC4's, and installed 3-prong
computer cords, with the ground
... There probably IS some reason nobody
did this
originally!
73,
Gary
WB6OGD
- Original Message -
From: Garey Barrellk4...@mindspring.com
To: Gary Winbladgarywinb...@comcast.net
Cc: drakelistdrakelist@zerobeat.net
Sent: Fri, 20 Jan 2012 15:31:44 - (UTC)
Subject: Re: [Drakelist] AC-4 (bias mod
potentiometer while you are in there rebuilding?
73,
Gary
WB6OGD
- Original Message -
From: Mark Pilant n1...@arrl.net
To: drakelist drakelist@zerobeat.net
Sent: Fri, 20 Jan 2012 01:52:42 - (UTC)
Subject: Re: [Drakelist] AC-4
Hi John.
That I've always done, as suggested by others
Gary -
In a word NO.
The PA stage is operated as a LINEAR amplifier, Class AB1, meaning the output signal is a reasonable
facsimile of the input signal. The BIAS voltage is carefully chosen to 'center' the operation of
the amplifier in the linear portion of the tube's operating region.
)
Subject: Re: [Drakelist] AC-4 (bias mod)
Gary -
In a word NO.
The PA stage is operated as a LINEAR amplifier, Class AB1, meaning the output
signal is a reasonable
facsimile of the input signal. The BIAS voltage is carefully chosen to
'center' the operation of
the amplifier in the linear
To: Gary Winblad garywinb...@comcast.net
Cc: drakelist drakelist@zerobeat.net
Sent: Fri, 20 Jan 2012 15:31:44 - (UTC)
Subject: Re: [Drakelist] AC-4 (bias mod)
Gary -
In a word NO.
The PA stage is operated as a LINEAR amplifier, Class AB1, meaning the output
signal is a reasonable
- Original Message -
From: Garey Barrell k4...@mindspring.com
To: Gary Winblad garywinb...@comcast.net
Cc: drakelist drakelist@zerobeat.net
Sent: Friday, January 20, 2012 3:24 PM
Subject: Re: [Drakelist] AC-4 (bias mod)
Gary -
Obviously the bias would remain in the Class AB1 area
: [Drakelist] AC-4 (bias mod)
Gary -
Obviously the bias would remain in the Class AB1 area for SSB and AM.
Applying a keyed signal to a non-linear amplifier is a bad idea. Every time
the drive is started or
stopped there is the opportunity for additional distortion products to be
generated. Some
@zerobeat.net
Sent: Thu, January 19, 2012 8:43:08 PM
Subject: Re: [Drakelist] AC-4
John,
As you suggested it would be easiest to just cut it off at the strain relief
and re-terminate inside. You will only lose about 6 to 8 inches at best.
73, Gary___
reasons I should have???
73,
Mark
N5KAE
From: Gary Poland gpola...@cinci.rr.com
To: John Gartman johngart...@charter.net; DrakeList Zerobeat
drakelist@zerobeat.net
Sent: Thu, January 19, 2012 8:43:08 PM
Subject: Re: [Drakelist] AC-4
John,
As you suggested it would be easiest to just
Message -
From: Garey Barrell k4...@mindspring.com
To: Gary Winblad garywinb...@comcast.net
Cc: drakelist drakelist@zerobeat.net
Sent: Fri, 20 Jan 2012 15:31:44 - (UTC)
Subject: Re: [Drakelist] AC-4 (bias mod)
Gary -
In a word NO.
The PA stage is operated as a LINEAR amplifier
My power cord from power supply to radio is a little poor looking at the
strain relief, and is more than likely a little brittle.
Should I try just cutting it off or replacing it? If I was to replace it any
recommendations on where to get this type of cord?
Thanks
John Gartman
AG6GL
:* [Drakelist] AC-4
My power cord from power supply to radio is a little poor looking
at the strain relief, and is more than likely a little brittle.
Should I try just cutting it off or replacing it? If I was to
replace it any recommendations on where to get this type of cord
: Death is not the worst of evils.
John Stark.
All my computers have my signature with various pearls of wisdom appended
thereto.
From: Charles Ring
Sent: Thursday, January 19, 2012 7:08 PM
To: drakelist@zerobeat.net
Subject: Re: [Drakelist] AC-4
Not sure what you mean by round third plug
Hi John.
That I've always done, as suggested by others, is to replace the two
conductor cord with a more modern grounded plug and wire. You can
see the one I used in the AC-4 rebuild I describe here:
http://www.n1vqw.net/ac4rebuild/
BTW, it is a standard computer cord, and I cut off the
Excuse, but I understood the question was about the multi-conductor cable
from the AC-4 with the Cinch-Jones termination, not the AC cord to the AC-4.
My power cord from power supply to radio is a little poor looking.
I am guessing his only option is to use single-conductor of appropriate
John,
As you suggested it would be easiest to just cut it off at the strain relief
and re-terminate inside. You will only lose about 6 to 8 inches at best.
73, Gary___
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Hello All,
I'm a newbie to Drake equipment, I just recently purchased a 4-line. When
the equipment arrived one of the tubes had come out of the socket in the
R-4B and it was broken so I'm waiting for a new tube. Everything looked
good in the transmitter but I thought I would look at the voltages
- Original Message -
From: Rick Gunderman wa4rg.r...@gmail.com
To: drakelist@zerobeat.net
Sent: Sunday, January 15, 2012 9:34 AM
Subject: [Drakelist] AC-4 Voltages
Hello All,
I'm a newbie to Drake equipment, I just recently purchased
a 4-line. When
the equipment arrived one
Thank you for your response Richard. Using the same meter, my line voltage
reads 122 VAC.
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Rick -
Pretty close for your line voltage. A little high, but not critical. I assume you are measuring
just the supply, no load.
750 VDC
300 VDC
-70 to -100 VDC
14.5 VAC
The filament voltage is high because of the cable and the heavy load (lotsa
filaments) 5.5 Amps.
73, Garey - K4OAH
Yes sir Garey, no load, just the supply.
On Sun, Jan 15, 2012 at 2:17 PM, Garey Barrell k4...@mindspring.com wrote:
Rick -
Pretty close for your line voltage. A little high, but not critical. I
assume you are measuring just the supply, no load.
750 VDC
300 VDC
-70 to -100 VDC
14.5
- Original Message -
From: Rick Gunderman wa4rg.r...@gmail.com
To: Richard Knoppow 1oldle...@ix.netcom.com
Cc: drakelist@zerobeat.net
Sent: Sunday, January 15, 2012 9:56 AM
Subject: Re: [Drakelist] AC-4 Voltages
Thank you for your response Richard. Using the same meter,
my line
with various pearls of wisdom appended
thereto.
From: Rick Gunderman
Sent: Sunday, January 15, 2012 12:34 PM
To: drakelist@zerobeat.net
Subject: [Drakelist] AC-4 Voltages
Hello All,
I'm a newbie to Drake equipment, I just recently purchased a 4-line. When the
equipment arrived one of the tubes
Thank you all for your replies. This week after I receive my 6EH5 in and
get the receiver going I'll turn the transmitter on and see what happens.
' 73
Rick - WA4RG
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Old AC-4 ... no AC-4R rebuild, original parts no load ...
718 vdc
286 vdc
-70 vdc
13.8 vac
___
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: drakelist@zerobeat.net
Sent: Sun, January 15, 2012 1:43:20 PM
Subject: Re: [Drakelist] AC-4 Voltages
- Original Message - From: Rick Gundermanwa4rg.r...@gmail.com
To: Richard Knoppow1oldle...@ix.netcom.com
Cc:drakelist@zerobeat.net
Sent: Sunday, January 15, 2012 9:56 AM
Subject: Re
- Original Message -
From: Garey Barrell k4...@mindspring.com
To: drakelist@zerobeat.net
Sent: Sunday, January 15, 2012 1:27 PM
Subject: Re: [Drakelist] AC-4 Voltages
Mark -
Interesting. A primary voltage of 121.5 VAC resulted in
measured AC voltages out of the transformer at 266
On Sun, 12 Jun 2011 23:37:44 +, Windows Live Team wrote:
AC4 keeps blowing fuses when the power to the T4XB is turned on. Anybody have
ideas?
Something is shorted somewhere in the power supply or radio.
73
-Jim
--
Ham Radio NU0C
Lincoln, Nebraska,
First check out the AC-4. Start
with http://www.wb4hfn.com/DRAKE/DrakeArticles/TechTips/PowerSupplyTroubleshooting.htm
73,Bob WW3QB
--- On Sun, 6/12/11, Windows Live Team wd9...@hotmail.com wrote:
From: Windows Live Team wd9...@hotmail.com
Subject: [Drakelist] AC-4 Issue
To: drakelist
, Jun 12, 2011 7:37 pm
Subject: [Drakelist] AC-4 Issue
AC4 keeps blowing fuses when the power to the T4XB is turned on. Anybody have
ideas?
Thanks 73,
Jude WD9FUM
=
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Bought 2 ac-4s and rebuilt one with the Heathkit shop board. I would like to
sell the other ac-4 has full cover ,very clean sn#28901,all cables and line
cord like new.
asking 99.00 split shipping
thanks
dale wt4t
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I recently rebuilt my AC4 power supply using the AC-4R Replacement
Power Supply PCB.
I completed the rebuild without errors but not without difficulty.
I found the references to the under chassis components and terminal pins
to be ambiguous requiring a lot of head scratching to get it right.
This is all you need. Just did one a couple of months ago, works great!
_http://www.theheathkitshop.com/page7/page7.html_
(http://www.theheathkitshop.com/page7/page7.html)
73/Paul, K4MSG
n a message dated 2/24/2011 12:18:12 P.M. Eastern Standard Time,
wd9...@hotmail.com writes:
Same for meeasy build, easy install, great performanceno-brainer.
Dino KL0S
On Feb242011, at 1222 PM, ph...@aol.com wrote:
This is all you need. Just did one a couple of months ago, works great!
http://www.theheathkitshop.com/page7/page7.html
73/Paul, K4MSG
Jude,
I too endorse highly the AC4R kit from Heathkit Shop, but would caution you as
he will in the literature with the kit to be SURE that you are comfortable with
working with the high voltage found in the kit. If so, it's the best!!!
73,
Don, WB5HAK
- Original Message -
From: Don Cunningham d...@martineer.net
To: memberservice...@live.com; drakelist@zerobeat.net
Sent: Thursday, February 24, 2011 9:57 AM
Subject: Re: [Drakelist] AC-4
Jude,
I too endorse highly the AC4R kit from Heathkit Shop, but
would caution you as he
To: memberservices-6 memberservice...@live.com; drakelist
drakelist@zerobeat.net
Sent: Thu, Feb 24, 2011 12:59 pm
Subject: Re: [Drakelist] AC-4
Jude,
I too endorse highly the AC4R kit from Heathkit Shop, but would caution
you as he will in the literature with the kit to be SURE that you
I'm rebuilding an AC-4 using the heathkitshop kit. I've got it all wired and
double (even triple) checked all the wiring. I don't see any problems. When
I power it up I get sparks and arching sizzle from where one of the red
wires attaches to the PCB pad. This is the 2nd one I've rebuilt... the
Bad solder joint... went back in and reheated the solder connections to the
PCB... powers up fine now!!
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I need a 24 inch piece of the AC-4 power cable with or without the Molex
connector. Does anyone out there have a drake power supply they have scrapped
or know of a source for this cable?
Terry,
W8NJR
Jon -
See below ...
kilo4wit wrote:
I'm in the process of getting some c-lines back to life. Befor I even
started to delve into these boxes, I am making the assumption that I
will need to replace electrolytics. I ordered all new single value
cans of near values from Mouser.
I have a few
I'm in the process of getting some c-lines back to life. Befor I even started
to delve into these boxes, I am making the assumption that I will need to
replace electrolytics. I ordered all new single value cans of near values from
Mouser.
I have a few questions on voltages:
AC-4
Pin #10 is
The rebuild kit is back up for sale,brand new never opened. The BUYER, I guess
flaked out, on the deal. I would like to get 50.00 for the kit shipped. Its the
kit from the heathkit shop.?? Would like to go via pay pal. for payment . pay
pal? is?? y...@aol.com Please get back off line.
I guess its sold ,pending funds. thanks to all? who ?e mailed.
dale wt4t
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Hi all again,
AD5IY still trying to get back on the air with my 4B twins.
I have not ordered the AC-4R kit yet. I plan on it soon though.
I have been looking inside my AC-4 and stuff, which came up with a question for
those that have already installed one of the upgrade kits.
I have found that
Jason -
D3 and D4 are connected in series to increase the Peak Inverse Voltage
of that leg of the voltage doubler power supply. I would NOT turn on
the power supply again! You have just been lucky so far. The B5G5
diode is only rated at 600v PIV, which is why Drake used two in series
in this
EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Good Morning All,
Many thanks to Lou, Chuck, Garey, Bill, and Eugene, for steering me in the
right direction re. the AC-4 modifications / upgrade article...
[EMAIL PROTECTED] writes:
QST for January 2008 it is...thanks...
Just a reminder to all, and there are various pictures of it on line, both
AC4 AC3.
That kit works nicely on an AC 3 (I have two).
Carl WD8NHK
**It's Tax Time! Get tips, forms, and advice on AOL
[EMAIL PROTECTED] made an utterance to the drakelist gang
--
Looking for the plug that mates with the AC-4 Power Supply
vox relay. A mfg part number would be great.
Tnx for your help.
73, Windy W4ZAA
richard radke [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Clair,
What I've used for years are pins from a discarded 8 pin (octal) tube
base...Break the plastic base apart with pliers...unsolder the pins from
Clair Truax [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Could someone point me to a source for the little two-pole relay plug
for the back of the AC-4 power supply, which I use to key an
amplifier? At
Here's how I homebrewed an AC-4 relay connector:
http://www.zerobeat.net/drakelist/voxrelayplug.html
Tom
On 11/29/06, Clair Truax [EMAIL PROTECTED] wrote:
Clair Truax [EMAIL PROTECTED] made an utterance to the drakelist gang
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Al -
Sounds good for an unloaded supply.
73, Garey - K4OAH
Atlanta
Drake B C-Line Service CDs
http://www.k4oah.com
n7ioh wrote:
n7ioh [EMAIL
n7ioh [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Thanks guys for verifying the voltages are within
the acceptable range.
Al, n7ioh
--
n7ioh [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hi all, I just installed my 120-240 VAC switch in my
AC-4 and replaced R3 with a 100 ohm 10 watt resistor
(was burnt). I wanted to be sure I did not have any
] AC-4
120-240V switch
Hi John, I thought ALL the later model AC-4's
were
duel voltage units only requiring an internal wiring
change. Mine is SN 55719.
The latest serial number I have is 58298 and it is a single voltage
supply. There are no cououts that don't have a factory connector mounted
Hi John, I thought ALL the later model AC-4's were
duel voltage units only requiring an internal wiring
change. Mine is SN 55719.
The latest serial number I have is 58298 and it is a single voltage supply. There are no cououts that don't have a factory connector mounted in them. It doesn't
[EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hi guys, I have the AC-4R kit I am going to install in
my AC-4 and was wondering about installing the
120-240V switch. My AC-4 is the later model and
already has the
Hi Al,
You are going to have to be sure that the transformer has a dual primary. If you have the cutout and there was no switch ever mounted in it, chanses are that you may just have a single primary tranny that will only work on 120V.
73,
John, W4AWM
Hi guys, I have the AC-4R kit I am going
[EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hi John, I thought ALL the later model AC-4's were
duel voltage units only requiring an internal wiring
change. Mine is SN 55719.
Al, n7ioh
On May
.
-Original Message-
*From:* [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] *On Behalf Of [EMAIL PROTECTED]
*Sent:* Thursday, March 03, 2005 2:54 AM
*To:* drakelist@www.zerobeat.net
*Subject:* Re: [drakelist] AC-4 Cap values
Carl,
Now might be a good time to review some slow-start feature design
] On Behalf Of [EMAIL PROTECTED]
Sent: Thursday, March 03, 2005
2:54 AM
To: drakelist@www.zerobeat.net
Subject: Re: [drakelist] AC-4 Cap
values
Carl,
Now might be a good time to review some slow-start
feature design reviews,
looking forward to incorporating one into the turn
:[EMAIL PROTECTED] *On Behalf Of [EMAIL PROTECTED]
*Sent:* Thursday, March 03, 2005 2:54 AM
*To:* drakelist@www.zerobeat.net
*Subject:* Re: [drakelist] AC-4 Cap values
Carl,
Now might be a good time to review some slow-start feature design reviews,
looking forward to incorporating one into the turn
Jim Shorney [EMAIL PROTECTED] made an utterence to the drakelist gang
--
On Thu, 03 Mar 2005 15:49:52 -0800, Carl Strode wrote:
What I may do is to install a NTC (Negative Temperature Coefficient)
high current thermistor in
Carl Strode [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I have completed re-capping the AC-4.
After looking at the actual caps installed, and comparing it to my
supply of modern electrolytics, I have replaced the
Carl Strode [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I am about to re-cap one of my AC-4s.
Looking at several schematics, I note that C5a and C5b are shown as 20
microfarads.
I have a parts list dated
Keith Hamilton [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I have read about the AC-4R rebuild kit from the Heathkit Shop. This seems
like an excellent kit but it brings a question to my mind. I have begun to
be
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Keith -
Your supply is probably just fine.. I have several supplies that are
considerably older than yours that still work as new. There are too
many
in the manual,
don't lose sleep over it.
- Original Message -
From:
Eric Webner
To: Drakelist
Sent: Sunday, December 26, 2004 1:58
PM
Subject: [drakelist] AC-4 power supply
diodes
I am working on my T-4XC (again!). I thought I would check out the power
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Does anyone on here have an idea where I can get a replacement power cable
for my AC-4 power supply? I'm talking about the cord carrying the filament,
B+,
Ron Wagner [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Lee,
If all else fails, you might be able to use discreet wires and heat shrink
tubing to make a bundle. Not the best option in my opinion, but something
I
Thom R. Lacosta [EMAIL PROTECTED] made an utterence to the drakelist gang
--
On Wed, 6 Oct 2004, Ron Wagner wrote:
ft lengths. Might be able to overlap enough to make it work out. Maybe I
got lucky with my bundle only loosing 1
[EMAIL PROTECTED] made an utterence to the drakelist gang
--
Heat shrink sticks to itself real well. Put on a piece and shrink it, then
overlap an inch or so with the other one and shrink it. It will be fine.
unless you plan
Thom R. Lacosta [EMAIL PROTECTED] made an utterence to the drakelist gang
--
On Wed, 6 Oct 2004 [EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] made an utterence to the drakelist gang
If their price is not to your liking perhaps they would just sell you three
feet of cable.
--Ed G--
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Lee Bahr
Sent: Wednesday, October 06, 2004 12:41 AM
To: [EMAIL PROTECTED]
Subject: [drakelist] AC-4 Voltage
Lee,
if all else fails, you might try bundling the rotor cable and
the extra conductors needed and then wrap the whole group with the plastic cable
protector jackets you can purchase at marine stores. if you are not
familiar with the stuff, it is black spiral wound plastic which is used to
Drake AC-4 power supply, 57239 serial number, with the 120V/240V switch. $75 plus shipping from 46835
Complete blower, motor and mounting assembly for the L4B AP with a GOOD fan. $75.00 plus shipping from 46835.
I also have 30+ drake crystals in various frequencies (SWL and HAM Bands) for the
MIKE BRYCE [EMAIL PROTECTED] made an utterence to the drakelist gang
--
the pcbs for the new drake ac-4 power supply are now in stock.
a very limited number of first run kits will be shipping within a week.
(waiting on first run
Everyone,
The AC-4 problem my friend was having where he was having trouble
interchanging them turned out to be bad contacts on the connectors! Detox
did the trick and all is well thanks to all who answered my question. Dan
IThe AC-4 that came with the TR-4CW will not fire up the TR-4C (the power won't even come on), and the AC-4 that came with the TR-4C will not power up the TR-4CWrit.
It should, it is a compatible supply for all the Drake transceivers.
Check the fuse, check to see if there is a 120/240switch on
Did someone modify one of the power supplies and
install a relay in it so the on/off switch controlsit rather then
the primary of the transformer? If so, they would not be neccessarily
compatible depending on the voltage relay used in the mod.
Lee, w0vt
Houston, Texas
IThe AC-4 that
]
Sent: Friday, January 30, 2004 11:42
AM
Subject: Re: [drakelist] ac-4's
IThe AC-4 that came with the TR-4CW
will not fire up the TR-4C (the power won't even come on), and the AC-4 that
came with the TR-4C will not power up the TR-4CWrit.It should,
it is a compatible supply for all
Al,
Sherwood made one for the R-4C I think. I just mount terminal strips under
the AC-4 chassis and put everything there. With a little planning its not a
difficult task. You can leave the original cans in place for appearances if
you choose.
73, Gary
The rumor is that this may work for the Drake AC4 as well. It was written up in qst a few months ago. Im not sure if there are parts differences or not. I need to contact himto confirm because I could use a few. I have 2 supplies that need fixing. If someone has more gumption then I do at the
Bill -
At a line voltage of 120 VAC, you should see about 740V no load. With idle
current ~70 mA, should read about 715 - 720, and at full load (~350 mA)
should be 650 - 660V.
The diodes are in a voltage doubler configuration.
73, Garey - K4OAH
Atlanta
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