Dennis
Thanks for your posting on the cap testing. I have no idea what my
older C-3 does for leakage tests but I found this interesting paper on
it...
http://www.kb2ljj.com/Manuals/37-Heath%20Kit/Heathkit%20C-3%20%5Bnotes%5D%20WW.pdf
It sounds like the C3 is supposedly set for 4.5 ma
I may try
Garey, Mike others as well,
The saga continues...
I lifted the lead of the Q7 base coupling cap ( the .1) and even tried
a new one of .1 and ,47..
Q7 voltages are:
Base = .5v
Emitter = 0v ( .003)
Collector = 18.5v IS IT SUPPOSD TO BE THAT HIGH?? Don't think so.
Audio at 12:00 id just ok
Anyone have a AC-4 supply. Plan to rebuild the supply with heathkit shop board
and parts. Will consider all as long as the transformer is good.
thanks
dale wt4t
please contact me off list. y...@aol.com
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After reading the manual, concluded that V2 is used as an amplifier on 80M, as
first mixer on higher bands. So, decided to replace V2 with another 6U8 I had
from working on a Globe Scout. Replaced V2, receiver is working again.
Had gotten a suggestion somewhere to replace the original 6U8
Wiggle the crystals in the back. I pulled my out of storage for a year and
had nothing on 40. I wiggled the crystal and it came back to life. I then
put some de-ox on the sockets.
Ryan N7QJ
On Sun, Apr 3, 2011 at 11:58 AM, wrote:
> My 2B suddenly quit this afternoon. Calibrator heard on
My 2B suddenly quit this afternoon. Calibrator heard on 80M, weakly on 40M,
nothing above 40M. Audio hiss on all bands. Ideas?
73, Curt KB5JO
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Richard,
Any readily detectable leakage is too much for a grid coupling cap IMO. A
cap that even partially closes the eye on the 1uA setting of my Heathkit is
grounds for replacement. Modern caps are cheap and easy to obtain. If you
don't like the bright colors of new axial caps, just slip a li
R4C 500khz CW filter $45 + $5 s/h.
Thanks
George K4MLB
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On Sun, 2011-04-03 at 11:10 -0500, Jim Shorney wrote:
> http://dictionary.reference.com/browse/tweak
>
> "3. to make a minor adjustment to: to tweak a computer program.
> noun
> 4. an act or instance of tweaking; a sharp, twisting pull or jerk."
very good all
I stand corrected.
Seems that al
On Sat, 02 Apr 2011 20:58:44 -0400, roncasa wrote:
>I always understood "tweaking" to mean maximize or peak;
>Did you mean "detune" or something to that effect?
http://dictionary.reference.com/browse/tweak
"3. to make a minor adjustment to: to tweak a computer program.
noun
4. an act or instanc
Dear all,
have you had a look on amazon.com where I found a 5 oz tin for $ 10.04 + $
6.50 for shipping e.g. to Germany? May be this is source to consider.
73 de Karl, DK7AL
Am 03.04.2011, um 07:27:04 schrieb geoffrey mendelson:
> On Apr 2, 2011, at 3:16 PM, Woody wrote:
> > Since I started back
Lee -
Mike has the answer. A leaky 0.1 uF coupling cap is the only, (also
least likely!,) thing left. I wondered about that last night, but the
resistor was more likely, even a cracked solder joint! :-) Being right
up against R137 doesn't help either.
Easy to check, just disconnect o
Richard,
Interesting..and I especially understood the last sentence..
Thanks,
Lee
-Original Message-
From: Richard Knoppow <1oldle...@ix.netcom.com>
To: 'Drake List'
Sent: Sun, Apr 3, 2011 1:08 am
Subject: [Drakelist] Testing Caps for Leakage
For years I thought it was sufficient
-Original Message-
From: Dennis Monticelli
Sent: Apr 3, 2011 1:22 AM
To: Richard Knoppow <1oldle...@ix.netcom.com>
Cc: Drake List
Subject: Re: [Drakelist] Testing Caps for Leakage
Richard,
That is very true. Paper caps can leak yet look OK for capacitance and not too bad for ESR. I t
Richard,
That is very true. Paper caps can leak yet look OK for capacitance and not
too bad for ESR. I think 5uA is too high for a paper cap. If that cap is
being used for plate to grid coupling and the grid circuit is 1 Mohm, there
will obviously be a problem.
I have a common Heathkit IT-11 c
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