Weber advice redo or new kit

[JMPGuitars]

I just remembered I have an old Realistic tube hifi that I was going to redo at some point or try to turn into a guitar amp. It’s stereo with 4 el84 output tubes. Could any of that iron be used to replace what I have or even build a new amp etc?

You need to find out what transformers you have in there, but most likely that would be better for a different amp project.

Do you know what copper cap model you have in there?

[wavey63]

I have the WCA4. How would I test to see what kind of amp I could use the trannys for? I would love to do another 18 watt but different circuit. I really want to thank you for all the help. Being home bound is driving me nuts so I’ve been modding and learning while I’m down. Lol.

[JMPGuitars]

According to their site, the WCA4 has a 28 volt drop. I don't remember for sure, but I think the EZ81 drops about 15 volts or somewhere around there. So switching the copper cap for an EZ81 should put the B+ in a better range.

Another option to raise the B+ would be to go with a solid state rectifier, but that might make it too high. I would start with the EZ81 and see where you are.

Regarding the other amp project, are there any markings on the transformers to identify the brand/model of them? Maybe post some photos of them...

[wavey63]

Thanks JMP. I’ll post pics tomorrow. I have an ez81 or two that I can try in the morning. I stopped using it because of paranoia about it failing and my amp melting down. Lol. Btw if you’re ever in CT I’ll buy you a beer or two for the help. Cheers!

[wavey63]

I attached pics of the transformers and huts of the hifi. Th PT has specs on it. What do you think?

[JMPGuitars]

The internet claims you can find more info about those in the 1960s radio shack catalogs somewhere here: http://www.radioshackcatalogs.com/catal ... ctory.html

At quick glance, the PT looks like you have standard 6.3v heaters, and 350-CT-350 which is high for EL84s, but you could use 6V6s or use zener diodes to drop the voltage down. You'll need to use a different chassis obviously and choose your rectifier tube wisely.