When I press and rotate the output meter control on my T4XB, nothing happens. I
have checked the switch and the 68 0hm resistor on it. They are Ok.
73 Peter, OZ8CTH___
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Yes, I reset the SENS, as it had increased to -1.45V.
I now have much better spread between min and max settings of RG GAIN as
well, and can almost get it to 60-over (it hits about 50-over).
Steve Wedge, W1ES/4
Live free or die: Death is not the worst of evils.
John Stark.
All my computers
Peter,
I presume you have power going out (tune or CW). I had a similar problem years
back and it turned out to be the switch. A little DeOxit or CaliLube (I forget
which) into the contacts and a few exercises of the switch fixed it up for me.
73,
Ron WD8SBB
--- On Sun, 1/15/12, Peter Ravn
Peter,
If you have verified continuity through the switch then look at the
schematic and you will see there is a 1N270 diode between the output meter
control pot and the antenna. If that diode is defective, missing, or has a
cold solder joint you will not get any reading.
Ken
WA2LBI
On Sun,
Peter,
Its usually a bad D5 ( 1N270 ) diode. The 68 ohm resistor on the switch is
for the plate current function only.
73, Gary
http://home.roadrunner.com/~w8pu
R-4A T4-X R-4B T4-XB R-4C T4-XC MS-4
L-4B
2A 2B 2C 2NT 2CQ 2AS 4-LF
TR-4 TR-4C TR-4CW/RIT RV-4C
TR-7 RV-7 CW-75 MS-7
WH-7 W-4 WV-4
Garey,
Please...Check your spam folder for my recent e-mail about ordering
CD's and my R-4B S/N 9129R.
You don't seem to be getting my e-mails??
Thanks,
Lee, KC9CDT
-Original Message-
From: Garey Barrell k4...@mindspring.com
To: Steve Wedge w1es1...@earthlink.net
Cc: Drake List
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 of the
Thank you for your response Richard. Using the same meter, my line voltage
reads 122 VAC.
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CHECK DIODES IN POWER SUPPLY. THEY ARE NOT HIGH QUALITY TO BEGIN WITH AND THE
TUBE REPLACEMENT CAN LOAD ONE OR MORE UP. HAVE SEEN ONE POP ON SEVERAL POWER
SUPPLIES AND THIS WILL GIVE YOU ABOUT HALF POWER.
DAN k8woz
- Original Message -
From: Greg Hemmings N4WVE
To:
Finally found the intermittent static in my R4A by poking around with a plastic
tuning tool, revealing the problem was on Board 3, with a (second) bad solder
connection, this time at Q8. This was the second bad solder joint on that
board, so removed the board and reflowed ALL of the joints.
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
Curt -
Not at all! The first step with a 'new' piece of gear, (right after verifying that the CORRECT fuse
is in the fuseholder,) is to go through and tighten all hardware, especially that which holds ground
lugs or shields to the chassis.
You don't see that many bad solder joints on Drake
- 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
Hey, Rick -
Welcome to the World-O-Drake.
Those voltages sound about right for an unloaded supply. They do drop once you
connect a transmitter to the supply.
73,
Steve Wedge, W1ES/4
Live free or die: Death is not the worst of evils.
John Stark.
All my computers have my signature with
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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Curt, with stuff this old, it's not a surprise. I use Cramolin on my tube
pins and it helps a lot.
An old war story: I bought a nice-looking NC-300 for $15 (!) at a hamfest in
the 90's (that was a steal even back then!). The seller said it was
intermittent. Some Cramolin on the tube pins
Old AC-4 ... no AC-4R rebuild, original parts no load ...
718 vdc
286 vdc
-70 vdc
13.8 vac
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Mark -
Interesting. A primary voltage of 121.5 VAC resulted in measured AC voltages out of the transformer
at 266 VAC, 108 and 98. The filament measured 14 VAC, all no load.
266 x 2.828 = 752 V peak
108 x 2.828 = 305 V peak
Both have very high bleeders, a mA or two so will reach near
OK,...all
Regarding this issue... I have done a lot of work on it and:
I see the wiring is different for:
The R-4A S/N 5900
R-4B S/N 9129 (That fails the same way as the R-4A)
R-4B S/N 10851
That I have here currently.
All 3 are different!
I can not run the R-4B S/N 10,851 right now as I have
I've got a decently-performing, but somewhat dusty, T-4X that I'm going to
offer to the Drakelist before I consider refurbing it - in case anyone on the
Drakelist needs a working transmitter. The transmitter works fine on 80 - 10:
I bought it with my R-4B that I'm currently using and now that
- 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
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