I replied to this thread starter's identical post on Sound On Sound forum.Here's info for anyone else in need of an exact Sytek gain knob replacement:Supplier: Mouser Electronics, Mansfield TX USA (http://www.mouser.com)part# 450-7005description: Eagle knobs, black aluminum, 0.75" diameter.These are...

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Back to topic; re: m The stock MCA SP1's sound really good as drum overheads. The designer of the Chameleon Labs tube SDC mics did a review on the MCA's in a TapeOp review and thought they were excellent. I'd hold off on the Jim Williams mod and use them straight from the blister pack for a while. ...

Back to topic; re: m The stock MCA SP1's sound really good as drum overheads. The designer of the Chameleon Labs tube SDC mics did a review on the MCA's in a TapeOp review and thought they were excellent. I'd hold off on the Jim Williams mod and use them straight from the blister pack for a while.

http://www.triodeel.com/7027.htm

Good reading.

I'd play it safe and take it to a good tech.

-or-

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enter "7027a" in their search engine.

Tronixmagnet wrote:If I change tubes on that amp do I have to rebias the amp or is it fix ?

Rebias? Yes.

alex , the Ampeg V4b would probably be a OK choice for a tube 100w head. Fender Bassman 100 or MusicMan HD130 are usable for bass if you use a a pair of 1x15 or a 2x15 cab and not playing at ear-shattering levels. The MusicMans with 6L6 tubes are probably a bit punchier on bass than the earlier EL3...

It's simple. The amp had a speaker with insufficient power handling capacity and blew up after being played at a high volumes and with lots of transient information. The "new" replacement speaker may fail too, even if it's rated at a higher wattage power handling level. An amp, when "...