Extend bias range

[Bugman3183]

Hello all,. Recently came into possession of a 68' custom deluxe reverb, and decided to swap the gz34 with a 5y3 ( just personal preference).  Using a probe (type that goes between socket and tube)  the highest I can adjust the tubes to is 12 ma.  My question is can I increase the range of bias by lowering the value of r59 from 22k to around 15k or so.  Or is there something else that needs to be done.  Thank you.

[sluckey]

can I increase the range of standby by lowering the value of r59 from 22k to sound 15k or so

Yes. I would not go below about 10K.

[Bugman3183]

Thanks for the reply slucky.  I'm cracking up at myself after reading my post( damn auto correct).  I've edited the post and it's hopefully easier to follow now.

[glass54]

Hi Bugman
You could fit 1R Metal Films on Cathodes (Pin 8) on V7 and V8 
Really easily monitoring of currents without fitting/removing probes.
Kind regards
Mirek