[HAM] no perc decay, A100

[Richard Gagnon]

To: LJRose
I just bought an A-100 for $400 here in western Canada, cosmetically excellent but with some "issues."  I knew from the moment I tried it out that I needed a vibrato scanner rebuild and that was 1 of the reasons I was able to get the seller down to that price.  The seller had inherited the A-100 after her uncle (a preacher) had passed away and the church had closed down.  He had been the original owner.  Anyway, I'm digressing.  Over the last week I was able to get great info. about the vibrato scanner job from all of you and it was greatly appreciated.  As to your problem LJRose, I was also having problems with my percussion decay and I've been lucky enough to hook up with a Hammond Tech.  You're on the right track with the advice from MTCasino.  Focus on the V6 as well as the socket.  I needed a new V5 and V6 (the socket(s) were okay) and the au7 which I understand you've already ordered.  I've learned a great deal from all of you as well as my own research over the last 2 months before I bought the A-100 and from my new Hammond Tech. buddy.  To think, I was ready to buy a used XK-2 for about $800-$900.  I'm very happy with the A-100 and my wife thinks it's a beautiful piece of furniture and a good deal too!  Everyone's happy!  Except, does anyone know where I can get a good, used Leslie 251?  Over the next little while I will be picking everyone's brain about the A-100 and Leslie compatability.  This was my inaugural message and like a politican, I've been a little long winded.  Thanks-Richard-Canada (redhotgoon at hotmail.com)> Date: Tue, 24 Jun 2008 15:12:04 -0500> From: lloydjrose at verizon.net> To: hammond at zeni.net> Subject: [HAM] no perc decay, A100> > Greetings;> > Many years ago when I bought the organ (A100) with the percussion not > working, I became very familiar with the percussion circuit. After a lot > of testing I discovered that "T5" had failed, and I luckily had a junk > M-100 for the part.> > However, now I'm trying to discover why the percussion won't decay. > It's a little maddening--the percussion wasn't working at all; I pulled > out the preamp to have a look inside, saw nothing amiss, hung it back in > place and the percussion was fine...tightened everything up, gone > again. Pulled it back out, the percussion's back but the decay circuit > just won't do its thing. > > The percussion audio signal is there, and can be made louder and softer > (all the way to off) by the perc cut-off resistor. The switches appear > to be working fine (loud-soft; 2nd- third, on-off. Decay?...)> > I swapped tubes V5 and V6 just to see what might happen; no > difference. I don't have a spare 12 AU7 for V7 to try, but the one in > there is fairly new (as if that really matters.)> > So, I'm pleading my case to you, the experts. Suggest test procedures > and I'll carry them out and report the results. I have the service > manual here and although it clearly explains how the circuit works, the > electronic concepts are just a bit beyond my grasp. Yes, I've ordered a > new 12 AU7.> > thanks in advance> > LJR> > > --> Subscription Options/Unsubscribe/Archives: http://www.zeni.net/hf/> Hammond-Leslie FAQ: http://theatreorgans.com/hammond/faq/> HammondWiki: http://www.dairiki.org/HammondWiki/> hammond at zk3.dec.com archives: http://zk3.hammondforum.com/> Beta Forum Port: http://www.hammondforum.com/forum/> 
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