Questions about Bryston 7B-ST

Hello Ozanhan,

I have owned 5 Bryston 7B-ST's, and am down to just one after breaking up the H/T set-up. I only powered mine down during thunder storms, or prior to going out of town.

The what you call weird, "zip zip zip" sound is normal after you walk a few steps away from the unit. The sound kinda sounds like when forwarding the film like a Minox 16mm spy camera. It isn't audioblely disturbing unless your ear in on the unit, I guess?

With the 7b-st's running for 6-8 hours steady, they should only be warm to the touch when setting your hand on the top plate. It shouldn't be hot enough to burn you?

I'm sorry I never spent quality time fondling the 7b-st's, to get to know their cold, warm, & hot regions?

Too bad you are so far and not in Canada like me because Bryston's guarantee is pretty much bulletproof and their service top-notch. Mine is on 24/7, but we do have decent electrical power in Quebec. It is impossible to know from what you indicate how big a difference in temperature there is between transistors, but I would not worry about it. Is there an authorized distributor in your area or at least somewhere in Europe? I would not worry if it works it works. When and if it stops, I would try to get the amps to an authorized repair centre. Good luck.

Hello Audiobugged,

- "The what you call weird, "zip zip zip" sound is normal after you walk a few steps away from the unit." : Ahh! i am happy to hear this. :)

- "The sound kinda sounds like when forwarding the film like a Minox 16mm spy camera. It isn't audioblely disturbing unless your ear in on the unit, I guess?" : I dont know the sound comes from Minox 16mm spy camera when forwarding. I wish i do. Yes, It isn't audibly disturbing, but only one channel makes that sound. That sound comes out from only left speaker. When i switch the amps
left right, it passes to right speaker. It is different from soft, relay click sound.

- "With the 7b-st's running for 6-8 hours steady, they should only be warm to the touch when setting your hand on the top plate. It shouldn't be hot enough to burn you?" : The problem is not the high level of heat. I have just measured using an infrared device after 8 hrs working, result : backside and frontside transistor blocks are 35 celcius, middle blocks show 40 celcius.May this heat difference show a failure of back and front transistors?

Thank you for your attention..

Best regards

Ozan

Hello Pbb,

- "It is impossible to know from what you indicate how big a difference in temperature there is between transistors" : Difference is not so big but may show a failure, am i right?

- "Is there an authorized distributor in your area or at least somewhere in Europe?" : Yes there is an authorized dealer, i have bought it from authorized dealer. They are not so helpful.

Thank you Pbb,

Kind regards