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Forum: Repairing Kustom Amps
 Topic: K200B-2 Hissing
Re: K200B-2 Hissing [message #27102 is a reply to message #27101] Tue, 13 November 2018 06:07
stevem is currently offline  stevem
Messages: 4112
Registered: June 2004
Location: NY
Senior Member
like Bill posted on this question back in 2016 it could be many things , and even some in concert with each other.
I would start off by replacing Q701 and Q702, or at least take voltage measurements and compare them to the PC703 schematic to see how Q700 thru Q703 are biased.

If you do such then note the test settings on the lower right of the schematic.
Forum: Comment Board
 Topic: Another schematic
Re: Another schematic [message #27103 is a reply to message #27066] Tue, 13 November 2018 08:56
rodak
Messages: 422
Registered: October 2001
Location: Georgia
Senior Member
This problem also comes up with Farfisa combo organs, which apparently used the same ceramic transducers y'all are talking about here. It's possible to find modern replacements for those transducers, but they're not cheap, approx $30 each if I recall correctly. I believe they're made by Lesa. If anyone wants details, I can dig through the archives in my combo organ group and find exactly which model(s) have been used successfully.

www.combo-organ.com
Re: Another schematic [message #27104 is a reply to message #27066] Tue, 13 November 2018 09:04
stevem is currently offline  stevem
Messages: 4112
Registered: June 2004
Location: NY
Senior Member
Yes, please dig up the info if you would!
Thanks in advance!
Re: Another schematic [message #27105 is a reply to message #27066] Tue, 13 November 2018 11:49
rodak
Messages: 422
Registered: October 2001
Location: Georgia
Senior Member
It's the Lesa "W" cartridge, available here:

https://www.pickupnaalden.com/element_detail.asp?M=Lesa_LESA -W_6896_3741

Looks like they've gone up a bit in price. No idea how much shipping would be to the US.

There was some discussion about this one versus an older 3-pin version, as well as one that attaches via "clips". I must say I'm not that well-versed in Farfisa Compact reverb tanks (I guess I should dig one out and have a look at it!), but it sounds like this 4-pin cartridge is electronically correct, and can be made to work with a bit of creative mechanical engineering.


www.combo-organ.com



Current Time: Tue Nov #d 23:41:30 EST 2018
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