The Amp Garage

RockinRocket wrote:Thanks! Exactly the info I was looking for!

Also there's a KT66 spec about how close they can be in a pair. C to C is about 4.5" I think.

I believe KF used the diode strings partly because he was familiar with them from his Ampeg days [clip] He did also say that only the 1N4007 was OK soundwise, and not to use later "improved" types which he believed did have a deleterious effect on tone. Yes, the V series amps have these, but not st...

Having been on the edge of it at the time, PR was making 'suggestions' to Ed Jahns about most of those amps, but he designed the Super Champ himself. It became a staple for LA studio musicians...now think about how many LA studio guitarists there were...sold 30 or so amps. Nobody was getting rich. A...

The 90% stuff will suck the water out of your finger tips...use an acid brush and gloves.

Do you have a load box? Put it in parallel with whatever cab you have...same impedance. That's -3dB, or another way, your 50W amp is now a 25W. Alternately, JJ 6V6S and adjust the Z appropriately.

You have the choke version...less work to do. Sweet really.

If you can find a connection with an MM 25+, they're not any wor$e than any other make. If not, I would go with a Heyboer Woden OT. I don't know the number, but it's supposed to be just fine. The MM might give you better resale...dunno. Do not go with Hammond or a Fender. AC-30 iron may as well be M...

I've got a 1939 Rickenbacher model 59 in and I don't want to take a Greenlee to the power cord hole. Any favorite replacements? The original is about 0.22" x 0.11". I have a good selection of grommets...not sure I've ever worked on something nearly 80 years old!

Who has the best rates right now? Anyone who has shipped anything large, heavy or just odd, knows that the rates were raised by all players in January. Several years ago, USPS introduced the flat rate boxes, and frankly, domestic and international shipping was simplified. I guess they made a mistake...

Anybody work on these? Customer has a Flightcase which seems to have tripped its output protection.

The trim pot definitely sounds suspect. I can't tell what you what is wrong, but basically trim pots and electrolytic caps are cheap and far less reliable than a carbon film resistor. Look a those components and make sure that bias ground is really ground. You don't see nylok nuts in production amp...

I too was caught unawares. I needed to ship a speaker to NYC and was absolutely appalled at the quotes. I went with FedEx...the only one under $30. From Jim's post, it doesn't sound like businesses are getting much of a break over retail customers.

The Eminence Red Fang is a 50W alnico speaker for under 200 USD. Not sure if it's a good idea for the Rocket, but it is alnico. I don't know what sort of VAT there is on imports to the EU.

Put a known good 20uF/500V across the power caps, one at a time. Sort of dangerous of course...you could tack it in each position

We had to actually derive Maxwell's equations from first principals in a midterm test in my fields class. I still get the shakes. :shock: But one of the results of Maxwell's field equations is that for high enough frequencies, the fields inside any volume completely enclosed by a conductive exterio...