Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Tubes and Hybrids => Topic started by: yamahajohn on July 31, 2016, 09:51:06 PM

Title: new tubes know bias
Post by: yamahajohn 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
Title: Re: new tubes know bias
Post by: Enzo 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
Title: Re: new tubes know bias
Post by: yamahajohn on August 01, 2016, 12:36:59 PM
thanks Enzo