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Author Topic: new tubes know bias  (Read 1952 times)

yamahajohn

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new tubes know bias
« on: July 31, 2016, 09:51:06 PM »
i have a 1482 silvertone and a premier 100r and a electromuse a46 if i put new tubes in them all clean and spray out the sockets will it hert anything or or smoke make poping sounds i did not see any pots to ajust a bias either i have know schematics for them or information is limited on  internet plus i just want to see if there any bad tubes they were so cheap off of amazon lol,thanks

Enzo

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Re: new tubes know bias
« Reply #1 on: August 01, 2016, 03:45:28 AM »
Silvertone 1482 is cathode biased, so there is no adjustment, it makes its own bias.
http://bmamps.com/Schematics/Silvertone/silvertone1482.pdf

Premier 120R is also cathode biased, and if it is like the 100R, the same applies.
http://bmamps.com/Schematics/Premier/Premier_120r.pdf

I have nothing on Electromuse A46, but I did find one from that brand, a small single ended amp which is also cathode biased.
http://bmamps.com/Schematics/Miscellaneous/electromuse_3.pdf

yamahajohn

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Re: new tubes know bias
« Reply #2 on: August 01, 2016, 12:36:59 PM »
thanks Enzo