Paul,
There is a mod to relocate the wiring that
connects from the power supply board to the can filter capacitor outside of the
main harnessand route themalong the outside edgeof the chassis
with heavier gage wire. This helps reduce the hum.
73, Gary
Hello list...I recently acquired a nice
R4C,but it has some issues...I powered up slowly on a variac,but the filter caps
were hopelessly shot. I replaced with a Sherwood filter cap kit.I have far less
hum,but it's still there,just not as bad(I can hear reciever hiss now). Would a
power
Bob Henderson [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Oh no he's back!, I hear you say.
I finally got some time this morning to put the R4C back on the bench. I
have modified my test setup to use direct
]
To: drake mailing list drakelist@www.zerobeat.net
Sent: Friday, August 12, 2005 8:37 AM
Subject: [drakelist] R4C IMD problem (was image problem)
Bob Henderson [EMAIL PROTECTED] made an utterance to the drakelist
gang
--
Oh
Hi All
I'm a great listener (reader) of all that appears
on this list, so while I'm a stranger you are not! I am a Drake fan of
long standing, starting out in the 60's with a Drake 2a, then 2b, then TR3 and
finally R4C # 21609 and T4XC # 24235 both bought new, here in Cape Town.
Last year
Yeah, well go to the dentist..
Yesterdaythe problemwas very much
there, so I decided to talk to you chaps about it
Today I have been on CW for a couple of hours and
never a peep of complaint out of it..
Thank you for comments thus far, and yes I'll keep
you posted Evan. I know
This is the fact:
Today arrived my second R4C, the first
one I have is a s/n 26540 and uses 6EJ7 in the mixers. The second one is a s/n
19776 and uses 6HS6
I would like to read some opinions about
the real difference of performance ( if a difference exists) between the two
revisions
The
thanks.
73 Bob, 5B4AGN
- Original Message -
From:
Gerry
To: [EMAIL PROTECTED] ; [EMAIL PROTECTED] ; [EMAIL PROTECTED]
Cc: drakelist@zerobeat.net
Sent: Thursday, May 26, 2005 10:00
PM
Subject: RE: [drakelist] R4C agc
problem
The AGC
characteristics
: drakelist@zerobeat.net
Subject: Re: [drakelist] R4C agc
problem
Bob:
I agree
with Mark about the AGC issue you have described. The audio will have a
somewhat distorted sound at times when in the fast AGC position. Slowing
the AGC release time downjust a bit will resolve that issue. I
personally
]
To: [EMAIL PROTECTED] ; [EMAIL PROTECTED]
Cc: drakelist@zerobeat.net
Sent: Thursday, May 26, 2005 9:22
AM
Subject: Re: [drakelist] R4C agc
problem
Bob:
I agree with Mark about the AGC issue you have described. The audio
will have a somewhat distorted sound at times when
was doing, I might be dangerous :-))
Thanks.
Bob, 5B4AGN
- Original Message -
From: Garey Barrell [EMAIL PROTECTED]
To: Bob Henderson [EMAIL PROTECTED]
Cc: drakelist@zerobeat.net
Sent: Wednesday, May 25, 2005 6:47 PM
Subject: Re: [drakelist] R4C agc problem
Garey Barrell [EMAIL PROTECTED
]>To: "Bob Henderson" <[EMAIL PROTECTED]>Cc: <DRAKELIST@ZEROBEAT.NET>Sent: Wednesday, May 25, 2005 6:47 PMSubject: Re: [drakelist] R4C agc problem Garey Barrell <[EMAIL PROTECTED]>made an utterance to the drakelistgang --
Mark V. Johnson [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Bob and Drake team;
I too am somewhat new to Drake gear and I found the exact same problem
with my R4B. I was certain I had a problem with the FAST
Hams are asking,Will
Dayton Hamvention have a Drake Forum this year???
Yes yes,it will be at
9:30 on Saturday Morning,same room as last year..
This will be a 2 hour
forum,lots of time for questions and answers,plus a speaker on the new upgrades
to rebuild your ac3 and 4 power supplies...
Greg [EMAIL PROTECTED] made an utterance to the drakelist gang
--
How much would a T-4XC be worth compared to a R4C (in similar condition),
I have two T-4XC's and thinking of putting out a trade ad. on one of them.
And how does
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
The T-4XB is worth about $150 - 200 and the T-4XC is about $200 - 250,
both without power supplies. The AC-4 supply is typically about $100 -
125. The
Carel, PA0CMU [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Kevin,
I should have one spare somewhere because I improved the power supply unit
and the audio amplifier. Consider that improvement as developed by
Looking for a substitution part for Q2 (Ep-487)
Any help appreciated.
Thanks,
Kevin Gray
F3WT [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Hi Garey:
I find this exchanges very very interesting also for a TR4!
Now I wonder abt the following:
I run only CW and would like to bias for class C
Garey,
I feel that I've got a good handle on this radio, and thank you for your support. Once I get a 3.3 ohm resistor in there, however, and assuming the meter series resistor no longer sets up an accurate 100 ma reading, is there a way to calculate the proper resistance, or is it just easier to
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Pierre -
This has been suggested before. There is a single reason to DO it, and
several to NOT do it.
The reason to DO it (start optimistically, right?)
Garey,
Yes, it is a T-4XC.
Eric
Garey Barrell [EMAIL PROTECTED] wrote:
Eric -A pot is easier, then put in the nearest standard value. You can use 5% carbon film resistors which are usually MUCH more accurate than that, selecting one from a group if available and necessary. Again, the meter is
Garey,
Several weeks ago when I discovered the play in one of the bandswitch wafers, I set the wafer where it should be and used adhesive on the inner wafer and shaft. It appears to work very well, and with no binding. I wouldn't recommend that for all the wafers, but just one seemed ok.
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Eric Webner wrote:
Garey,
Several weeks ago when I discovered the play in one of the bandswitch
wafers, I set the wafer where it should be and used
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Eric -
There isn't a good way to correct the wafer play once it occurs,
short of wafer replacement. I have seen some with very thin Teflon?
tape wrapped
Hi Joe,
Have you made any progress on your radio? I didn't see any responses on drakelist.
It seems the crystals are ok, so it must be a wire or more probably, a switch contact. The wafer switches on these radios seem to corrode a bit, with the metal parts turning black. You might be able to
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Most switching problems in Drake gear are a result of wafer misalignment
or wafer center hole wear. Making sure the switch assembly hardware is
tight
Garey et al,
I appreciate your comments. Perhaps I did a little too much work on my T-4XC.
I just finished restoring my transmitter, and during my work I found a few problems with wafer misalignment and too much "play" on certain wafers. Can you comment on the best ways to correct these
Joe Roth [EMAIL PROTECTED] made an utterence to the drakelist gang
--
I've added a lot of xtals to my R4C. I began to use position 11 which is now
in the 3 (bottom most) row. The entire row for positions 11-15 will not
work. The
Rein A. Smit [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Hi All,
During some time now, I have been trying to locate on the internet
information on mods for the R4C, in particular for the product detector,
the
Rein A. Smit [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Hello All,
Here is what I have been able to find on mostly the R4C receiver
http://www.nitehawk.com/rasmit/r4c.html
73 Rein W6/PA0ZN
Looking for a nice set of dial plates... I've got a R4C that is otherwise
very nice, except for scratched up dial plates.
Thanks!
John K5MO
---
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.727 / Virus Database: 482 - Release Date: 7/26/04
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Lee -
You are correct.! And I just spent three weeks making a full parts
list and board locator layout of the C Line Guess I was still
Ron Baker [EMAIL PROTECTED] made an utterence to the drakelist gang
--
My two cents worthI now step up on my soap-box.
I consider the Drake equipment as some of our history, ham radio heritage.
To tear apart a
Gary Poland [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Ditto Ron.
Gary
--
On Behalf of Gary Poland [EMAIL PROTECTED]
Submissions:
In a message dated 8/21/2004 8:56:30 AM Eastern Daylight Time, [EMAIL PROTECTED] writes:
[EMAIL PROTECTED]
To: [EMAIL PROTECTED], [EMAIL PROTECTED]
J Roth, N4ARI [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Why does the NB board for the R4 cost so much now?
Is it simply that there are so few around or was it expensive originally?
Has anyone tried their hand a
Roth, N4ARI [EMAIL PROTECTED]
To: Drake List [EMAIL PROTECTED]
Sent: Friday, August 20, 2004 5:33 PM
Subject: [drakelist] R4C NB pricing
J Roth, N4ARI [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Why does the NB
Grant Youngman [EMAIL PROTECTED] made an utterence to the drakelist gang
--
... ,snip Today a working unit sells
on eBay from $125 to around $200.I don't know how many Drake
manufactured but you don't see them for sale
Gary Poland [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Thom,
I dont think these guys are concerned about others fixing their
radios...besides I have repaired a ton of Drakes and have yet to destroy one
to
, August 20, 2004 9:43 PM
Subject: Re: [drakelist] R4C NB pricing
Gary Poland [EMAIL PROTECTED] made an utterence to the drakelist
gang
--
Thom,
I dont think these guys are concerned about others fixing their
radios
else could they of ever had this opportunity if I didn't done this? One was
sacrificed to help 10! Dan
- Original Message -
From: Gary Poland [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, August 20, 2004 9:43 PM
Subject: Re: [drakelist] R4C NB pricing
Gary Poland [EMAIL
: Saturday, August 21, 2004 12:00 AM
Subject: Re: [drakelist] R4C NB pricing
But if you REALLY need a part for an old Drake that had been for
example. Damaged in shipping or dropped on the concrete floor by
its owner
You would be glad to have a part from a parted out radio. Or would
While sending cw a steady, but weaker tone, is heard in the background. It continues until the relay switches back to receive. Any suggestions as to what part or parts have deteriorated? Thanks
Paul
K7CKZ
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