For Sale:
Drake RCS-4 Serial #1186. Best Offer
I am the original owner so I know it's history.
I had this unit working at my QTH for abt 10 years back in the 70s and
80s, then I went QRT until recently.
The control box is in very good condition and was in storage in my attic
for many years
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
Loren McCullough wrote:
Partial success.
Abbatron/ H.H.Smith Part. No. 874 were a direct drop in replacement
for the original binding post board (a.k.a. terminal strips). Got
them replaced and then hooked up t
know if you get it going.
Rick
W0RT
- Original Message ----- From: "Loren McCullough"
To: "Richard Tucker" ; "drakelist"
Sent: Sunday, August 07, 2011 2:09 PM
Subject: Re: [Drakelist] RCS-4
Finally got the switch box apart. Have to replace all the external
and worked fine and is still working. Be
careful of the phenolic board the strips are made out of, it can be
brittle.
Rick
W0RT
- Original Message ----- From: "Loren McCullough"
To: "Richard Tucker"
Cc: "drakelist"
Sent: Wednesday, August 03, 2011 6:48 AM
amfest and have worked on it a
bit. Do you have specific questions?
Rick Tucker
W0RT
- Original Message ----- From: "Loren McCullough"
To: "drakelist"
Sent: Sunday, July 31, 2011 2:57 PM
Subject: [Drakelist] RCS-4
Anyone have any experience or insight into resurrectin
Anyone have any experience or insight into resurrecting an RCS-4. I
haven't really looked at either piece yet. The control head has been
sitting in my attic for abt 20 years and the remote antenna switch has
been sitting outside in the elements.
Off subject, I also have a Ham-II/CD44 rotor a
That's the problem I've always had with the design of the Weller gun,
the contacts for the tips get corroded. I used to have a Wen 100/200
watt pencil gun that had a different design and never had to reestablish
the contacts. And it could be used for more precision work. Used it
till it brok
There were about 15 emails in my Spam folder, some in chinese, most in
english, all addressed to Drakelist
Loren - WA3WZR
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After some advice from Garey this last month, I thought I had my TR-4C
working properly, but it limped through Field Day. It is still not
working up to par and it looks like I'm going to have to go over the
whole thing to get it working properly again. This may be a fall
project, just too muc
same depth as the rest of the 4-Line,
it's just that the TR-4 is deeper than everything else! :-)
The C-4 IS a little shorter though.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
Loren McCullough wrote:
The RV-xx cabinets are shorte
The RV-xx cabinets are shorter as well.
Loren - WA3WZR
On 6/24/2010 4:46 PM, Garey Barrell wrote:
Lee -
I thought the same thing, but all the Drake 4 Line cabs are the same
depth! Except I guess the watt meters, at least that's all I can
think of. The 7 Line has a lot of short cabs, so per
, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
Loren McCullough wrote:
What factors could contribute to frequency instability EXTERNAL to
the PTO?
My TR-4C has just developed a "jittery" frequency, jumping back and
forth around center freq
What factors could contribute to frequency instability EXTERNAL to the PTO?
My TR-4C has just developed a "jittery" frequency, jumping back and
forth around center freq by as much as 50Hz. I know someone (if not
many) will refer me to the excellent articles on PTO rebuilds, but
before someone
just FYI,
I took the TR-4C back to my work bench and looked it over again out of
the case. Saw nothing, then I tried it on my spare AC4 (both AC4s have
been rebuilt btw) and found no issues, took it back to the shack and
tried it again and now all is functioning again. Have no idea.
Still
be in the wrong socket, or is the same tube
in it's same socket?
Lee, w0vt
- Original Message -
*From:* Loren McCullough <mailto:loren...@verizon.net>
*To:* LEE BAHR <mailto:pulsa...@embarqmail.com>
*Cc:* drakelist <mailto:Drakelist@zerobeat.net>
ocket pins? If you did, you could
have set up leakage paths over insulation.
Lee, w0vt
- Original Message - From: "Loren McCullough"
To: "drakelist"
Sent: Sunday, May 30, 2010 9:59 PM
Subject: [Drakelist] TR-4C issues
Was just putting my TR-4C back in servi
Was just putting my TR-4C back in service after having done some minor
maintenance on it, now I am having some issues and need some assistance.
Here are the symptoms:
was tuning it up on 40m and could only get a maximum of about 80 watts
out of it. I started going to different bands to check
oal is to make the temperature as constant as possible,
really not to worry about the exact temperature.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
Loren McCullough wrote:
Garey,
have been checking my RV-4C out of the case and it has been
abs
ause I don't want to block off the only
air vents in the bottom of the case.
Any further thoughts?
Thanks,
Loren - WA3WZR
On 5/18/2010 6:58 PM, Loren McCullough wrote:
On 5/8/2010 10:57 PM, Garey Barrell wrote:
Loren -
Yeah, it do make a difference.. :-)I dunno where I got RV
Just an update on what I have found out. AADE does NOT have a display
that will work on the TR3/4/4C/etc., his will only work directly on the
"twins". Neil admitted this to me in an e-mail.
He recommended the DD-103 from Electronic Specialty Products (which I
believe uses his DFD3 board).
27;wandering' around,
'jumping' in small increments??
Do you happen to have a heating / A/C vent that could be blowing air
into the back of the RV-7?
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
Loren McCullough wrote:
I have a
I have a TR-4C with an RV-4C. While most people wouldn't notice drift,
I use mine for digital modes and drift is an annoyance.
Of course there is always drift during warm-up. After 10-15 minutes,
the internal PTO is as solid as a rock and NO drift is noticed, however,
even after warm-up, the
I have seen the digital displays from AADE mentioned here and they look
good.
Anyone interfaced one with a TR-4C?
Loren - WA3WZR
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Not sure that will work, if memory servers, they may be different
threads. The original screw in feet of the AC-4 (shorter than the RV-4
feet, they were just half-rubber balls attached to screws) were to be
used to hold the AC-4 in the RV-4/RV-4C/MS-4 cases.
Loren - WA3WZR
On 1/15/2010 11:44
ving the same symptoms.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com
>
Loren McCullough wrote:
Thanks for your advice Garey,
will try to get to it this weekend. It is getting worse and keying
the mike is not fixing the problem anymor
ing on the RCVR K line when the unit is in receive mode. Of
course, this type of problem is difficult to sort out since it only does
it 'a little' and by the time you get the covers off it's
working!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supp
Just to be sure we are not diagnosing the wrong problem
here. When I say the S-meter goes up, it is really the entire
receiver that is affected, it's like a strong signal is being received
and nothing else can be heard.
WA3WZR
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those two tubes to decrease considerably. It's
also
possible than one of the tubes may have an internal fault.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com
>
Loren McCullough wrote:
Lately, my TR-4C has developed
an
- K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com
>
Loren McCullough wrote:
Lately, my TR-4C has developed
an annoying quirk. Shortly after turning it on (sometimes
immediately, sometimes after 10 minutes or so), the S meter will go
nearly ful
Lately, my TR-4C has developed an annoying quirk. Shortly after
turning it on (sometimes immediately, sometimes after 10 minutes or
so), the S meter will go nearly full scale and stay there. Usually
keying the mic several times will stop this and it will return to
normal operation (only has d
I bought a DC-4 supply off e-bay.
Checking it out, all the voltages appear to be fine except the bias
voltage, appears that R8 is bad.
What I need to confirm is that this supply appears to have been modified.
There is a switch in the bias circuit that swaps the output to pin 9
between the wi
The more I look at this, it appears to be a non-factory mod, just
can't figure why. The switch in the circuit swaps pin 9 between the
wiper of R8 and an added circuit that looks like it supplies a
constant negative DC voltage (added circuit includes a 100mfd
capacitor + side to ground and a di
I have recently bought a DC4 off of e-bay and am just getting around
to testing it (had to make a connecting cable). Have it hooked to a
supply on my workbench (I know, it won't do 30 amps, but to at least
test the voltages before actually connecting it to my TR-4C I thought
it should have ple
Thanks for the info. C145 does not appear to be
shorted in any of the 4 segments. I am suspecting the power supply
at this point. Using WB0IQK's trouble shooting as a guide here is
what I am seeing:
pin #10 - 710 volts DC, < 100mv AC
pin #11 - 285 volts DC, < 100mv AC
pin #4 - abt 14Vo
I just had a resistor on the relay board burn out. According to the
Board picture (from K4OAH) it is R192 from what is left of this
resistor (and the pictured on the board) it appears to be a 27 Ohm
resistor (red-violet-black), but according to the schematic it is a
.27 Ohm resistor (red-viole
My rig has developed an occassional problem, but only on 20 meters.
Sometimes after switching to 20 and tuning up, I can key the mic and
the transmit power immediately goes to full power and stays there (no
variance in the power while talking and/or data input via SignaLink
USB interface). I
Anyone have a source for the S-310-CCT and S-312-CCT power
connectors? Mouser, Newark, Digikey and Jameco all list them as discontinued.
Loren - WA3WZR
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Lacking the availability of a DC-4 power supply, anyone have any
opinions or experience using a Power Inverter with the AC-4 supply
for portable operations?
Loren - WA3WZR
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How does the RV-4C affect the PTT circuit?
Here is my problem. When the RV-4C is not plugged in everything
works as expected, but I can't use my internal VFO at the moment (see
my other thread on the unstable VFO). With the RV-4C plugged in, all
I can get to work reliably is VOX, (don't want
Me again, resurrecting my TR-4C from storage.
The internal VFO is sometimes very unstable and sometimes cuts out
altogether, but other times it works fine. I am not sure it is any
tubes, since the RV-4C works fine, and I didn't thing transistors
would do that (just cut out completely).
Lore
Anyone know of a fix for the VFO slipping?
I have taken the knob off and made sure it is all tight against the
bushing when reattaching, but it does slip (just slightly) during
regular movement of the dial.
Loren - WA3WZR
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nsmit kicks
off. Any suggestions to correct that?
Loren - WA3WZR
At 05:15 PM 9/11/2008, Garey Barrell wrote:
Loren -
First, turn the ANTI-VOX full CCW.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com
>
Loren McCullough wrote:
I
I have been off the air for awhile and I am trying to resurrect my
TR-4C/RV-4C from storage. My brother had used the rig up until
several years ago and it was working fine then.
I am having two main issues with the equipment, and I believe they
are related to the VOX and Relay control circuit
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