Re: [Drakelist] Testing Caps for Leakage

2011-04-03 Thread Paul Gerhardt
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

Re: [Drakelist] Fwd: My R-4B audio?

2011-04-03 Thread kc9cdt
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

[Drakelist] need a ac-4

2011-04-03 Thread yash
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 ___ Drakelist mailing list Drakelist@zerobe

Re: [Drakelist] 2B Problems

2011-04-03 Thread rhulett1
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

Re: [Drakelist] 2B Problems

2011-04-03 Thread Ryan Scott
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

[Drakelist] 2B Problems

2011-04-03 Thread rhulett1
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 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelis

Re: [Drakelist] Testing Caps for Leakage

2011-04-03 Thread Dennis Monticelli
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

[Drakelist] R4C CW filter for sale

2011-04-03 Thread George Rybicki
R4C 500khz CW filter $45 + $5 s/h. Thanks George K4MLB ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist

Re: [Drakelist] 60 meter 50 watt equivalent from a dipole

2011-04-03 Thread tuxman
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

Re: [Drakelist] 60 meter 50 watt equivalent from a dipole

2011-04-03 Thread Jim Shorney
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

Re: [Drakelist] Deoxit at Musician's Friend

2011-04-03 Thread Karl du Roi
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

Re: [Drakelist] Fwd: My R-4B audio?

2011-04-03 Thread Garey Barrell
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

Re: [Drakelist] Testing Caps for Leakage

2011-04-03 Thread kc9cdt
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

Re: [Drakelist] Testing Caps for Leakage

2011-04-03 Thread Richard Knoppow
-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

Re: [Drakelist] Testing Caps for Leakage

2011-04-03 Thread Dennis Monticelli
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