The soft start kits sold by Harbach are totally different for SB-220 amps and
L-4B amps. My opinion is they are both way over
priced. The PC layouts are done in amateur fashion and not very logical, in
my estimation. (They certainly could be layed out much smaller and have much
shorter
Has anyone on here installed a Harbach SS-400 type Soft Start kit in their
L-7? (This is the kit with the single relay and single dropping resistor
and not the one used in a Heath SB-220). I know the SS-400 was made to
install in a L-4B amp. I have not really studied the room requirements,
Mike;
In today's society you never blame fault on yourself or your own ignorance!
You have to blame it on others. Installing your AC-4R and the one for the
Drake amps is a no brainer if you can read a schematic. You don't even need
written instructions if you can read a schematic and
I think it is called Drake TR-7 grey.
Take the cover to Sherwin Williams and they will match the color for you.
Lee, w0vt
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Best bet, leaking capacitor, or even a small chance it is a cracked resistor.
Lee, w0vt
- Original Message -
From: Kevin Nathan
To: drakelist@zerobeat.net
Sent: Saturday, January 15, 2011 12:53 PM
Subject: [Drakelist] Noise In R4-C
Hi All,
I would like to draw on the
Why don't you do the obvious? That is, resolder the filament pins. Seems to
me a filament wire coming out of the glass envelope is not making a good solder
connection to the filament wire. Just because the solder at the end of the
filament pins look good doesn't mean the wire within the pin
Yes, you got it, the filament wire coming out of the glass envelope is most
likely not soldered to it's pin. (Outside looks mean nothing). It could be
one pin or the other. Maybe it was never soldered properly by the manufacturer
but as someone else mentioned, many times the tension of the
I had a TR-4 once I acqured with the same problem. The calibrator signal
was very strong but the reciever was deaf. Apparently the rig was hit with
a lightning strike and took out the couple turn link from the antenna to one
of the can transformers. (I don't have a schematic in front of me).
When you installed the AC-4R kit, you most likely mounted the board using the
transformer bolts. If you used them, are the bolts and nuts tight? If not,
this could have created your hum.
Lee, w0vt
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You can use the center conductor and insulation from a piece of RG-8 coax.
Lee, w0vt___
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I could never understand why anyone would send their cabinet to Harzell for
repainting in the first place. Since they powder coat them now, their process
is not the same as when they first painted them with Polane paint. If the
company is not going to make them look original, why use them?
My post has nothing to do with 7-Line paint finishes.
Lee, w0vt
I could never understand why anyone would send their cabinet to Harzell for
repainting in the first place. Since they powder coat them now, their process
is not the same as when they first painted them with Polane paint. If
Many years ago, just before Drake stopped accepting TR-4 s for repair, my
neighbor, WA5VGO sent his TR-4 to Drake for some repair. The radio came
back with three different final tubes then when shipped to Drake. One of
the three new tubes was as you described. A sweep tube with a printed
It's been my experience when this happens, it is a tantalum capacitor that blew
up. Is there was there one nearby?
Lee, w0vt
- Original Message -
From: Richard Palmer
To: Ron
Cc: Drakelist
Sent: Friday, August 20, 2010 8:37 PM
Subject: Re: [Drakelist] Fire... really
I give up and don't plan to use the other Drake list unless I have to. I
sent a message 4 1/2 hrs ago and it still is not posted. Sent another one
and that too is not posted. Life is too short for this! If they want to
moderate, fine, but get some moderators on board. Thank goodness this
It took less then 2 minutes to get this message posted. Still waiting for
the yahoo one.
Lee, w0vt
- Original Message -
From: LEE BAHR pulsa...@embarqmail.com
To: Drake list drakelist@zerobeat.net
Sent: Thursday, August 12, 2010 8:54 PM
Subject: [Drakelist] The OTHER Drake List
I
It's now been over 5 hrs 20 min since I posted a message on the Yahoo Drake
Radio list. Still no post. I would suggest to anyone wanting to post
something about Drake stay away from that list. I was told to be patient.
Why? A moderated list should not only have great members, but also great
I need to apologize as pointed out by another member to Garey. As it turns
out, my message never got sent to the Drake Yahoo group moderator, Garey. I
sent a copy of the message to Garey. I also found out my Yahoo e-mail
started to bounce at the same time. I have no idea why it was
I use my table saw and chop saw to cut fiberglass PC board all the time. They
cut great, true, accurate and very easily. It's a piece of cake.
Lee, w0vt
- Original Message -
Fellow Drake Enthusiasts,
Yes, the subject line is strange but trust me, it does relate to
Did you spray a lot of some sort of spray cleaner on the switch contacts and
all over the tube socket pins? If you did, you could have set up leakage
paths over insulation.
Lee, w0vt
- Original Message -
From: Loren McCullough loren...@verizon.net
To: drakelist
BAHR
Cc: drakelist
Sent: Sunday, May 30, 2010 10:11 PM
Subject: Re: [Drakelist] TR-4C issues
No, hasn't been cleaned like that in many years. I should mention the
maintenance I was doing was cosmetic, not electrical/mechanical.
Loren - WA3WZR
On 5/30/2010 11:08 PM, LEE BAHR wrote
Do you all realize there was a web site a few years ago that showed you how to
modify a TenTec noise blanker to work in a Drake R-4C? The thing was modified
by Rob Frohne, KL7NA. I don't know if his e-mail address is still good but it
was fro...@wwc.edu (E.F. Cross School of Engineering).
I'm getting into this Noise Blanker thing, late. Have not read all the posts.
If FAR Circuits were given a board layout, he is most willing to make small lot
single sided boards at nominal cost. I used him not too long ago for a special
board I needed and he made them for me. I think he is
I did the mod to my first L-7 after I bought it new.
1. You remove a set stop screw on the bandswitch so it can go into the 10
meter slot position.
2. You remove a coax assembly which is made up of two pieces of coax and a PC
board in between the two. (It filtered out any 11 meter RF that
Here is the problem as I see it. The sub base metal on the chassis has to
be pit free before any plating is going to restore the copper finish on a
Drake chassis. Whenever I have seen the copper in bad shape on a Drake
Chassis, the steel chassis has also been pitted. In my mind, if you plate
No, it won't start a car but it will start a solid state answering machine or
trip a wired burgler alarm.
Lee, w0vt
- Original Message -
From: Chuck Grandgent
To: drake
Sent: Wednesday, June 24, 2009 3:17 PM
Subject: [Drakelist] Great R4B questions
There's an R4B
Paul:
I bought one of the first C line transmitters and recievers when they first
came out. They had the plastic gears. I ruined the receivers PTO gearing
twice before I learned not to 'BANG the dial against the dial stops on each
end. Before obtaining my C line I had a TR-4 with metal
My guess is the bias supply caps are probably bad and you are getting AC on
the bias which does not show up on the meter. (The peak AC volts are
masking your DC set point). At least replace the bias electrolytics, but
why not just put in an AC-4R board with all new parts including all the
Sorry, didn't read your second paragraph.
Lee, w0vt
- Original Message -
From: Bob Fish rwf...@comcast.net
To: drakelist@zerobeat.net
Sent: Thursday, May 07, 2009 2:02 PM
Subject: [Drakelist] T-4XC Problem
Hi Guys,
My T-4XC has stopped transmitting. I have normal idle current. But
Sorry to hear this, Bob. That is a wierd situation. It is an obvious melt
down somewhere in the high voltage chain in the radio from the prolonged
keydown situation.
The finals are gone, we know that. Do you have another AC-4 power supply?
It might be possible the the power transformer now
It's 27 ohms (RED-VIOLET-BLACK).
Lee, w0vt
- Original Message -
From: Loren McCullough loren...@verizon.net
To: drakelist drakelist@zerobeat.net
Sent: Sunday, April 05, 2009 7:57 PM
Subject: [Drakelist] TR-4C resistor identification help
I just had a resistor on the relay board
So what were your reports before you put in the black plate tubes? Maybe black
beauty caps will give EQ reports for you. Go for it! Personally I use grey
plate tubes and people tell me my audio sounds like sawdust through a tin
horn! It doesn't get better then that!
Lee, w0vt
-
Did you turn on the receiver before you hooked up the three PTO wires? As I
remember, there is a tantalum cap that can BLOW if the PTO wires are not hooked
up. As I remember the low voltage for the PTO derives from a high voltage
point and if you have no load', the dropping resistor doesn't
Emil:
All kidding aside, your idea of using magnets is a really great idea. I'll
use your idea to good advantage with my Drake equipment. I've got a lot of
it and your idea will allow me to use ONE FAN on all my Drakes, depending on
which one is on the operating table to be put into use.
Yes, but do the rare earth magnets suck your 40 meter signal into the fan
and then expel it out on 20 meters?
Lee, w0vt
- Original Message -
From: w9nm w...@sbcglobal.net
To: drakelist@zerobeat.net
Sent: Sunday, January 18, 2009 4:55 PM
Subject: [Drakelist] Mounting Fans
I
To the RACK, I say!
Lee, w0vt
- Original Message -
From: Garey Barrell k4...@mindspring.com
To: drakelist@zerobeat.net
Sent: Wednesday, January 07, 2009 8:59 PM
Subject: Re: [Drakelist] Hammarlund
I am shocked, SHOCKED I say, to hear that you spend time with Hammarlund
The relay in my TR-4C is indeed has a 2.5K coil but the resistor in series
with the coil is 27 ohms @1/2 watt. It is R192.
Lee, w0vt
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This is for reference:
I am working on restoring a stripped TR-4C. One thing wrong with it is the
filter cap needs replacing (the 4 section can electrolytic in my case. I
think earlier ones had a 3 section can electrolytic). My can electrolytic
is definately bad. That resistor you are
The relay used in some Drakes rigs including some TR-4s and the TR-4C is
Mouser Part Nbr 655-R10-E1Y4-V2.5KIt is a Potter Brumfield
R10-E1Y4-V2.5K I bought one a few days ago and it cost $16.68. This is a
2.5K relay. Some Drakes used a 15K relay but they can be interchanged if a
Smooth. The Polane paint jobs came later, I think it started with the C
line.
Lee, w0vt
- Original Message -
From: Carey Lockhart
To: drakelist@zerobeat.net
Sent: Thursday, December 25, 2008 6:57 PM
Subject: [Drakelist] t4x case type
hi gang and merry christmas
does the
Well now that I have bought this In Need TR-4C, I need some parts. I
ordered some tubes I didn't have on hand plus a new 4 section can
electrolytic made for this radio from Hayseed Hamfest today. (I had
purchased some of Tom's caps for my Heath DX-60A and DX-60B and liked them
very much.
Well, I never learn. I saw a TR-4C with a nice front panel, no cabinet
screws, missing one small knob, no relay, burned out 1/2 watt resistor on
relay board, missing 7 small tubes, missing two crystals, and no pilot lamps
just loose lamp sockets. I also was told the multi section can
Yes, others have done it, (1/4 inch jack), and when I acquired the radios, I
put the original size jack back into the radio. The smaller size plugs are
so easy to find/buy as they are used in aircraft, so I can't understand why
someone would screw up a vintage radio like this with such a
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Now here is some real data to go on! Looks great. Would probably be very
interested in purchasing two of them when available after field trial..
Lee
w0vt
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Not true about the cost of Beppe's unit vs Dan's unit. Beppe said they are
working on a NEW DFS-4 that used a chip producing NO spurs, and the new unit
would
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
One more thing! What kind of readout is on this thing? LED display?, LCD
display? No display? How do you tell what frequency you are on? Using a
push
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
How do 3 LEDs and a board duplicate a FS-4? How clean is the signal? If it
is dirty I would not be interested. If it is clean I maybe would be
interested
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
How pure is the output signal? Have you run tests to see if the unit has
birdies? If it has birdies, where are they?
Lee, w0vt
drakelist gang
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I am not interested. A 500 khz step unit would be useless for ham use.. I,
as most hams would require as a maximum, a 500 hz step design..
Lee Bahr, w0vt
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I would say any FS-4 clone should provide steps of 100hz. (.1 Khz).
Anything less then this would be a drawback and design flaw. 500 khz step
spacing
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
What can wipe out the plastic gearing besides oiling and lubricating them is
BANGING THE GEARS ON THEIR END STOPS! I'm talking about running the dial
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I bought one of the first L7 amps made by Drake. I wrote them immediately
after the purchase and asked how to open the amp for 10 meters. They sent
me
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Why don't you do the mod as Drake came up with for their customers many
years ago and has been outlined on this reflector before? Once the mod is
made, you
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
How can this be? There is no gray on Drake
cabinets?
Lee, w0vt
I first stripped away that disgusting sticky
paint!
I heated the cabinet in the oven at about 220F. I
then applied brown primer spray. The primer boils on contact causing a rough
surface. I let the primer dry. I then applied
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Wellerrraaahhh, yes, it's a joke! (Maybe I should say it's all sold
out)!
Lee, w0vt
- Original Message -
From: PWells [EMAIL PROTECTED
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
This guys BS has been circulating for a couple of years now. It's alchemy
so don't hold your breath. It's best to listen to people who know something
about
Lee Bahr [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I need help guys. Remember the QST article on building a synthesizer for
Drake rigs that was in QST a couple of months ago? Some of you guys said a
key part
Permeable Tuned Oscillator. The vfo oscillator is tuned by moving a piece
of ferrite in and out of a coil thus changing it's inductance.
Lee Bahr, w0vt
Houston
- Original Message -
From: Thomas E Collis [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, April 28, 2004 7:17 PM
then likely if you used it, you
would have to "stiffin" it with some clear plastic.
Lee Bahr
- Original Message -
From:
David Austin
To: Drakelist
Sent: Thursday, February 26, 2004 6:54
PM
Subject: [drakelist] Blue filter gel
(C-line)
Just trying to get hold o
I think a seller can do anything he wants with his
radio short of misrepresenting himself.If he chooses not to test it before
selling it, fine, but don't say you have done so. A buyer has an
obligation to look for an oxymoron and quiz the seller on his ad. (How can a
radio be known to be in
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
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