Bottlehead Forum

Bottlehead Kits => Stereomour II => Topic started by: borism on May 04, 2016, 05:12:18 AM

Title: Matched 2A3s?
Post by: borism on May 04, 2016, 05:12:18 AM

While I have the original Steomour I believe the circuit is the same as the II edition. I was wondering how important it is to have the 2A3s closely matched? Somehow I recall reading it wasn't.

Title: Re: Matched 2A3s?
Post by: Doc B. on May 04, 2016, 05:15:39 AM

It's not too important when the tubes are run single ended, aside from gross mismatches like a totally worn out tube on one channel and a new one on the other, which might cause some imbalance.

Title: Re: Matched 2A3s?
Post by: borism on May 04, 2016, 05:26:16 AM

Thanks! One of my NOS(?) tubes blew and I bought a replacement that tested good but clearly won't be a close match.