jolida 502b manual bias adjustment

This may be old news but, this is what I use on my Jolida 502A. It is a Bias Rite model #BR-4 by Weber. It shortens the bias time and allows you to make very accurate bias settings and compare each socket to make they are all the same at the turn of a switch. The test points on these amplifiers are not very good in my opinion. I love using the Bias Rite it has worked very well for me.

i use shorter probes and a short screwdriver and have never had a problem. i have big hands as well. i think you may be overly concerned with forcing probes into a real tight and locked position. the probe slots are not top of line but then again you do not need to sink the probes in very far to get a solid read out. i use a digital radio shack unit and it is 1,2,3.

I'm not overly concerned. It's just an easier method that works for me. I don't have to hold on to probes with one hand while trying to make adjustments with the other hand. This way I can leave the amp where it is in my rack and make the adjustments. But hey if it works for you that's great, it doesn't for me that's why I chose this approach.

did not mean to imply your method was inferior, etc... i was speaking to OP. just wanted to point out that the connections to spikes do not have to be rock solid to get job done. if i had longer tools it probably would be easier as a matter of fact but the probes can stay in place free standing long enuff to let go of them for adjusting slot screws. ntl, i think auto bias is a gret option, i wish that feature was offered on mine but it was introduced later on.

Veroman

Do you have the 502B and if so is it modded. I have a 502A that was modded by Response audio and I love it. I can only imagine how much better the higher end tube amps sound.