UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Bush VHF61, my first restoration attempt.

ThePillenwerfer · 25th Jan 2012, 8:08 pm

Good news indeed.

The ECC85 is indeed prime suspect but it could be other things, not least capacitors.

The next thing to do is change THAT capacitor. This is correctly called the AF coupling capacitor and joins the anode of the EABC80 to the grid of the EL84 - top of the EABC80 to the side of the EL84 on the diagram.

This will almost certainly be leaking (electrically if not physically) and if you operate the set for long are putting the EL84 and output transformer at grave risk.

When you've changed that check the voltage on pin 2 of the EL84, hopefully there won't be one!

It would be as well if you told us which service data you are using as different ones use different numbers.

Keep up the good work

Joe

25th Jan 2012, 8:08 pm	#19
ThePillenwerfer Octode Join Date: Mar 2011 Location: Sheffield, South Yorkshire, UK. Posts: 1,453	Re: Bush VHF61, my first restoration attempt. Good news indeed. The ECC85 is indeed prime suspect but it could be other things, not least capacitors. The next thing to do is change THAT capacitor. This is correctly called the AF coupling capacitor and joins the anode of the EABC80 to the grid of the EL84 - top of the EABC80 to the side of the EL84 on the diagram. This will almost certainly be leaking (electrically if not physically) and if you operate the set for long are putting the EL84 and output transformer at grave risk. When you've changed that check the voltage on pin 2 of the EL84, hopefully there won't be one! It would be as well if you told us which service data you are using as different ones use different numbers. Keep up the good work Joe __________________ "Experts are only good at one thing: explaining why something will not work!"