The Amp Garage

Turned out to be the PI plate load Rs

Wish I could help, no SW generator. I tried different a different speaker. After posting, I googled, and apparently this is a know issue with this amp, as it's usually the dropping resistors in the power supply, or the PI plate resistors, or socket solder issues. I was actually going to do the PI pl...

I've got this HRD here. It works, but there is a crackle/fizzle/sizzle that's pretty prominent. Sounds like a bad preamp tube issue, but isn't. This amp has all new tubes, and filter caps. When I take the preamp out to another amp, the slave amp is fine, and has no fizzle, denoting it's at the PI or...

Thanks man, that's what I was thinking.

I reckon I know the answer, but I've got to ship an amp to EU, with 230V mains. The PT I want to use has 120V and 240V primaries, and looking around at aftermarket offerrings, it seems a lot of PTs stick with 240V, as the "non-US" offering. I've only seen a few with 230V AND 240V. If the tolerance o...

Ok great! So these would be Emi's version of the ceramic SROs, which were essentially EV12Ls, correct?
I see weber has a Michigan, both Alnico and ceramic, which look like they are Weber's EVs

Here's the front view, Steve

Ok great, I'll take some pics and post them up once I get into the conversion.

Ok cool , thanks Leo, I'll give that a shot. STeve here's the sticker

I busted out my childhood amp today, a '71 Super Reverb, that I used in my Rocknroll days in the early 90's. Back then I turned it all the way up. It's a glorious sounding amp that had been modded by the local guru back in the day, which essentially is push pull pot that places a large cap over the ...

What a treat!

It actually did sound good. Owner had me put a 10" jenson alnico in there, and I biased at around 20mA. Owner was thrilled it broke up earlier/had less headroom.

Here ya go : http://www.rickresource.com/register/viewitem.php?id=19156 http://www.rickresource.com/register/viewitem.php?id=35274 Looks like a Rickenbacker from the 30s Generally speaking you can't just replace a FC speaker with a permanent magnet one, as the FC usually serves as some sort of choke...

Yep, its got a bunch of nice new components, too

I'm an idiot. I grabbed the nearest 9 pin bias check and had it plugged into voltage not current setting. Forgot that's my one checker that actually measures current and not mV that you interpret as mA. Turns out the tubes were barely conducting. This is the most tricked out Blues Jr ever now!