The 2-NT manual, page 2, shows a schematic of hooking up the 2-NT with an
R-4A. I assume hooking up to the R-4C would be something similar.
Unfortunately, it is not exactly plug'n'play. The diagram shows the 2-NT's
sidetone cable connecting To Pins 2 or 5 of V7, 6EH5 or to arm of AF Gain
Control.
I ran the output from the HG-10B's phono jack through 2' piece of rg-58 coax
to an old crystal holder. I took a non-ham band crystal, unscrewed the metal
plate, took out the crystal, drilled a hole in the end for the coax,
soldered the wires, and put the plate back on. It looks neat and makes it
My MN-2000 with original paint has the rough surface paint.
Tom N7TM
On 1/22/07, Mike Rowlands [EMAIL PROTECTED] wrote:
While we are talking about Drake paint finishes, would somebody please
confirm that MN-2000 was originally shipped with a smooth finish?
Thanks,
Mike
VA3MR/G3NKR
The paint on my TR-3 is smooth, too. The cabinet definitely does *not* look
like it's been repainted.
Tom n7tm
On 1/19/07, LeMoine Family [EMAIL PROTECTED] wrote:
LeMoine Family [EMAIL PROTECTED] made an utterance to the
drakelist gang
100
uf caps with 330 uf caps and the 80 uf cap with a 120 uf. That's what I had
in my junk box. Why is that supply so over-voltage now? Perhaps I have a
wiring error, though I carefully checked for errors.
Thanks,
Tom n7tm
On 12/20/06, Tom Taylor [EMAIL PROTECTED] wrote:
I replaced the diodes
Hey Garey,
Perhaps I can help. I have a TR-4 s/n 19651. The accompanying manual
(original, not a copy) has no schematic number on it underneath the block
letters SCHEMATIC DIAGRAM MODEL TR-4 TRANSCEIVER. Perhaps it's older than
the numbering system used on later manuals.
Another TR-4 s/n 31985
in daily use. You wisely chose to use it on the test bench instead.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Donnie Garrett
Sent: Tuesday, December 12, 2006 5:27 AM
To: Tom Taylor
Cc: drakelist@www.zerobeat.net
Subject: Re: [drakelist] AC-4R upgrades
in my
station.
Hope this helps, Don / WA9TGT
On 12/11/06, Tom Taylor [EMAIL PROTECTED] wrote:
I have a number of Drake A, B, and C twin combos. I decided to upgrade
all the power supplies with AC-4R boards. Since most of the caps are now 30
to 40 years old, I don't want to risk a bias supply
I have a number of Drake A, B, and C twin combos. I decided to upgrade all
the power supplies with AC-4R boards. Since most of the caps are now 30 to
40 years old, I don't want to risk a bias supply going out and ruining the
finals or some short ruining the transformers. I order a bunch of blank
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
Just got some time to look at the 2-C again and go through all the suggestions.I swapped V4 with a NOS 12BE6. It made no difference to the s-meter.Thanks for the clarifications on the resistances around V3. My 2-C is #2804, well past the changes made at #1000.
I measured the DC voltage at C48:
My 2-C receiver became deaf after a couple of months of not turning it on. I took the covers off and carefully deoxit'd the bandswitch and other wafers. That didn't have any effect. Then I wiggled each tube and found a culprit. I deoxit'd the tube sockets and that did the trick. I've never aligned
10/11/06,
Jason Buchanan [EMAIL PROTECTED] wrote:
Tom Taylor wrote: The receiver receives well, but the S-meter is extremely stingy. A very loud SW broadcast station may only read S5.Will be interested to hear what you find out...I have an R-4 that
exhibits the same on its S meter.It receives fine
Is there a way to know when the bias supply has died? Suppose you're sitting in front of the radio, it appears to be operating normally, and then the bias suddenly disappears (i.e. diode opens, cap goes out, etc.). At this point, you're simply listening to the receiver. What indication would you
I guess Ive been really careless
with my use of DeOxit because I havent been careful at all when spraying
the various wafers of the switches underneath. Perhaps Ive taken decades
off the long term life of the radios, but in the past ten years, I havent
noticed any degradation. Ten years
Tom Taylor \(MSTV\) [EMAIL PROTECTED] made an utterance to the drakelist
gang
--
What I do is take an old non-ham-band crystal of the correct size and
unscrew the little top cover plate. I remove the old crystal inside
A TR-4 is better for CW than a TR-3
because of auto-break-in. In other words, when you put a TR-4 in CW mode, you
can still hear the receiver. When you key the transmitter, a relay closes and
at the end of keying, depending upon delay, the transceiver switches back into
receive mode. When
Tom Taylor \(MSTV\) [EMAIL PROTECTED] made an utterance to the drakelist
gang
--
Drake Aficionados,
I'm putting a recently purchased L-4B back on the air after the amp has
experienced an unknown period of inactivity. When I
Tom Taylor \(MSTV\) [EMAIL PROTECTED] made an utterance to the drakelist
gang
--
Thanks to all who responded with the tip about the L-4B's fan's oil
ports. A couple drops of oil in each port immediately solved the noise
problem
Tom Taylor \(MSTV\) [EMAIL PROTECTED] made an utterance to the drakelist
gang
--
An intermittent problem I see with my R-4 T-4 (the xmtr without a VFO)
pair is after transmitting, the receiver is often practically deaf. A
few
Sounds like it's time to get the Discovery Channel to
sponser a diving expedition to recover those radios! (like they did with Gus
Grissom's Liberty Bell) The documentary would be fantastic; at least to those of
us on this list :-)
Tom N7TM
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