Technics SA300/303 DC offset?

[macyjrm]

I have a pristine SA 300 but the DC offset readings are 70mv+ left channel and 110mv+ right channel. I can't see any pots to adjust on the power board. Anyone know the correct way to adjust offset short of replacing output transistors?

 

[nashvillebill]

Isn't this a STK module for the output? In which case, no adjustment for DC offset...

 

[macyjrm]

Correct. Each is marked STK0039. Do these readings imply replacing them is the next step?

 

[jgmacv]

I have a pristine SA 300 but the DC offset readings are 70mv+ left channel and 110mv+ right channel. I can't see any pots to adjust on the power board. Anyone know the correct way to adjust offset short of replacing output transistors?

I recently picked up an SA-303, and was wondering also about dc offset adjustment. Also, love your avatar, Group Captain Mandrake and General Ripper spending quality time together at Burpleson AFB.......

 

[macyjrm]

Thanks, I spent a lot of time on SAC alert during a USAF career. We used to watch "Dr. Strangelove" for motivation. Kubrick was absolutely brilliant. Good luck with your 303. My 300 looks like it just came out of the box. Found it in a local pawn shop. Paid $50 (I know too much) but my son-in-law has been looking for something just like it for his office.

 

[jgmacv]

Thanks, I spent a lot of time on SAC alert during a USAF career. We used to watch "Dr. Strangelove" for motivation. Kubrick was absolutely brilliant. Good luck with your 303. My 300 looks like it just came out of the box. Found it in a local pawn shop. Paid $50 (I know too much) but my son-in-law has been looking for something just like it for his office.

I was in the Air Force also, for 11 years. After my first enlistment, I'd explored retraining into a flight crew job. I was at Pope AFB, North Carolina at the time and those C-130 loadmasters seemed to really enjoy the job and travel. Only enlisted flying jobs open at that time were B-52 gunner and tanker boom operator. I'd always heard horror stories about "whynot" Minot and KI Sawyer, plus the infamous SAC alerts. I wound up staying at Pope in my cushy orderly room admin job (still regret not trying it out).

 

[nashvillebill]

Correct. Each is marked STK0039. Do these readings imply replacing them is the next step?

Not necessarily a need to replace them IMHO. If it sounds OK, I'd just play it and don't sweat it.

 

[macyjrm]

Thanks Nashvillebill. It sounds good. I'll just give it to my son-in-law with a money back guarantee. Jgmacv I spent two years at K.I. Sawyer. Moved there with a lot of concern. Had a blast! Bought two snowmobiles and went native. Great folks up there.