5150 Bias Mod DIY

[marder explorer]

Hey guys, I've been a member for a little while here, but always lurked. Anyway, just picked up a 5150 block logo from a forumite over at harmony-central, and want to do the adjustable bias mod. Haven't seen it explained very well anywhere on the net.

My main question is: what kind of rating do I need on the pot/resistor, since it is in the bias supply? I read about one instance of using a miniature pot, so it fit easier, but that's not confirmed to work.

Any info?

[Slick51]

I modded mine using a 10k 1/2 watt fullsize pot, and a 6.2K, 1/2 watt resistor. Send me a mail and I'll see if I can find a photo to send of the process.

Slick51

[JerryP]

I have the 5150 bias mod info on my site http://www.fjamods.com/5150BiasMod.html
Jerry

[marder explorer]

What a hackjob that cobbled install is.


Sad to think that somebody probably paid good money to have that done.


Thanks for the info Jerry, that's exactly what I needed.

[Broken]

I have the 5150 bias mod info on my site http://www.fjamods.com/5150BiasMod.html
Jerry

Sorry to hi-jack. Jerry do you happen to have any pics of a bias mod for the 2 channel Dual Rectifier?

[Slick51]

ME

Check your mail...if you didn't get it (it's a 3.15MB file) write back. I'll reduce the size and send it again.

Slick51

[marder explorer]

Got it, Slick.


Thanks!


Got my 1959 in today, so my attention is diverted from the 5150, well...still gotta sell it, I guess.

That's another thread.