Recent content by 59Pan

I've heard some great feedback on shipping by bus. No conveyors. No throwing packages. No rough handling. Packages are put on a cart. Then, hand-stowed in the belly of the bus with luggage. Removed and put on cart. The best of handling. If you ship anything with a Reverb spring tank in...

Thanks for waking this thread up. What value of resistors did you use for your replacements? I used a 10 ohm for each, on one of the heads. Really no idea as to why Guild used a 6.8 ohm, but I now have some of those on hand. No speaker cabs. Just heads. Jack

I haven't been on this thread for some time. I'm glad that I receive a notification by email from time to time. I had forgotten about it. To date, I have four Thunderstar Bass (black cabinet) heads, and one gold Thunderbass head. No speaker cabinets. On three of the Tstar Bass heads, and...

Found the issue with the power switch. It is a 3-position switch, apparently is not original to the amp. I now have it wired to have one 'Off' position, and two 'On' positions. At least now, I can power it down with the switch. I will pick up a Carling short-bat power switch to replace it...

Update - 11Aug15: I didn't realize how long it's been since I put my hands on this amp. Life is just too complicated. I have a couple days off before working an 8-day stretch of long hours. It's a rotating schedule at the plant, so I know when it's coming. I replaced the second canned...

Foolishly, I thought that I would be able to get something done on my amp, since the intense Spring of long hours at the plant. Not so. But, I haven't put it aside. I'm going to have to continue in bits. One more power supply canned capacitor to replace, before moving on. Hopefully, no...

Got out to the shop yesterday morning (19Jun), before the sweltering heat could run me out. Replaced one of the power supply canned caps (just to the right of the power cord in the above picture), and brought it up on the lamp limiter. Just to ease the new caps into service. Made a big...

Re-assembled the Supersonic and connected to the lamp limiter. It failed before I could go past my 60 watt bulb. I stepped through four bulbs, 25, 40, 60, and 100 watt. So, the first test is to remove the 5U4 rectifier tube and try again. It passed, as I observed the filaments begin to glow...

Got out to the shop this morning, and fitted the handles to each end of the cabinet. Also, installed the threaded insert in the center of the bottom of the cabinet. Now, I can mount an Ampeg dolly when I want to roll it around. Cleaned the two 8" speakers, and installed both, along with the...

I have a couple Troubadours and one 2501 Basso. Here's the schematic for yours, at the bottom of this page: Schematics - Hilgen Amplifiers Keep the 7591's. You can still find replacements. Jack

Maybe. But, I've got quite a few old amps that have the tubes hugging the speaker. All seem to be in good working order with speakers original to the amps. It has been suggested that it was moved to put more weight on the other end, as that was the end where the casters were re-mounted...

Got off work at a decent hour, today (Sun). So, I took a quick peek at a potentiometer code. According to this website: The Guitar Dater Project - Pot Code Reader This what I have for a code of 1346350: Potentiometer Info This potentiometer was made by Mepco/CentraLab, Inc. in the 50th week...

Not yet. Will get the potentiometer codes off of it, the next time I'm out in the shop. I'm thinking 60's, but no idea as to the time period. This amp does not match any of the Sano schematics that I can find. However, a fellow on the Hoffman Amp site gave me a schematic for the power amp...

I managed to get a day off, and tried to mow between showers of rain and drizzle. At least while it was wet, I cleared a bench and set the Sano Supersonic project on it for pictures. Though the camera is constantly on the blink, today it worked well enough for some pictures. The amp...

Your ground switch will connect a capacitor on either leg of the power cable, by flipping this switch. This is used to select for the least hum. I have a scanned copy of the operator instructions, but it is 9 Meg in size. Too large to upload here, or email. You also have a Hum balance pot in...