Search found 322 matches
- Mon May 13, 2024 4:39 am
- Forum: Technical Discussion
- Topic: Hypothetical Amp Discussion
- Replies: 9
- Views: 381
Re: Hypothetical Amp Discussion
What would you recommend as a starter amp? Would it be a better learning experience to start with a kit or with a full build? Have you had a look at Rob Robinette's site ? He has a lot of info on building amps, you might find a good first build there. My first build was a kit from Mojotone, their S...
- Sat May 11, 2024 1:03 pm
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 10
- Views: 291
- Sat May 11, 2024 3:25 am
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 10
- Views: 291
Re: A SSS Build
Just clicked these pics. The last pics I posted were actually a few days old so this is the result of a few days work. 20240510_202417.jpg 20240510_202436.jpg 20240510_202451.jpg 20240510_202504.jpg 20240510_202519.jpg Tomorrow, after a good once over, I'll most likely begin on the transformers.
- Sat May 11, 2024 3:13 am
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 63
- Views: 2895
Re: 2nd Gen Build
Second, there is a distinct "electrical" smell coming from the area of the power amp part of the chassis. Everything seems to measure normal and visually appears normal. So not sure about what is going on with that. Will work on biasing the FET next. -Dan Try looking for any arcing in a very dark r...
- Fri May 10, 2024 2:29 pm
- Forum: Dumble Discussion
- Topic: For anyone wanting to set the PI Trim pot
- Replies: 65
- Views: 87574
Re: For anyone wanting to set the PI Trim pot
Just a word of caution on these piher balance trimmers. If they sit for a long while not having been moved, they can develop an oxidation and non-conduction over time when you do move to a new setting. This just happened to me on an AB165 build where I had implemented that balance trim put for the ...
- Fri May 10, 2024 2:17 pm
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 10
- Views: 291
Re: A SSS Build
Nice! This motivates me to pull out my empty Erwin chassis too and get to work. What are the relays going to switch please? On my previous Erwin-sourced chassis I found those wing nuts stripped super easily after a couple of uses. I ended up drilling out slightly larger holes and using normal chass...
- Fri May 10, 2024 4:06 am
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 10
- Views: 291
Re: A SSS Build
Here's what the build looked like a few days ago. Heater wires done, working on power tubes. Mounted 12v transformer for relay power. Whe I went to mount the 12v rectifier board found it wouldn't fit, caps were too big and interfered with PT. Ordered some physically skinnier caps, now waiting for th...
- Fri May 10, 2024 3:59 am
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 63
- Views: 2895
Re: 2nd Gen Build
Congrats on keeping the ever elusive magic smoke contained!
Great looking build! I like your color choice for the heater wires, you'll see why soon...
Have you used the Jupiter caps before? If so what do you think of them?
Edit: spelling
Great looking build! I like your color choice for the heater wires, you'll see why soon...
Have you used the Jupiter caps before? If so what do you think of them?
Edit: spelling
- Fri May 10, 2024 3:48 am
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 10
- Views: 291
Re: A SSS Build
Hi Glenn, I'm excited to watch this build! I wanted to also drop you a note to thank you, because seeing your post reminded me I forgot to order those doohickeys for my two Erwin chassis. -Dan My pleasure Dan, you're welcome. Thank you, it's feedback like this that makes posting feel worthwhile! He...
- Thu May 09, 2024 12:45 pm
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 10
- Views: 291
Re: A SSS Build
Found these at Grainger.
- Thu May 09, 2024 12:41 pm
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 10
- Views: 291
A SSS Build
Hello. My name is Glenn and I'm an Ampaholic.... :D After several months of saving my pennies-which was actually just stalling and trying to talk myself out of it-I ordered a SSS Chassis from Erwin. Told myself I was just getting one before he sold out of them, I'm going to put it away for a future ...
- Wed May 08, 2024 10:00 pm
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 33
- Views: 898
Re: ODS 102 with 2x KT88s and built-in Dumbleator
Not sure if I'd ever need to switch it in or out mid-song, great question to consider if it's worth putting on a pedal. The relay was used primarily to keep the wire runs shorter. My goal was to keep it as close to 102 as possible when the Dumbleator was not in use. The possibility of putting it on ...
- Wed May 08, 2024 5:30 am
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 33
- Views: 898
Re: ODS 102 with 2x KT88s and built-in Dumbleator
bcmatt I did a very similar build, if I were to put together a schematic of my build it would look nearly identical to what you pieced together. On mine the switch to select or bypass the Dumbleator is actually a relay. I did this mainly to avoid long signal wire runs to a switch. Where I was able t...
- Wed May 08, 2024 3:58 am
- Forum: Dumble Discussion
- Topic: My take on a 2nd Gen ODS
- Replies: 89
- Views: 2908
Re: My take on a 2nd Gen ODS
Found a Gen 3 schematic and it matches the layout.
- Wed May 08, 2024 3:41 am
- Forum: Dumble Discussion
- Topic: My take on a 2nd Gen ODS
- Replies: 89
- Views: 2908
Re: My take on a 2nd Gen ODS
Something I noticed and am curious about. The green wire goes to the 220k OD entrance, then to a 33k then to OD1 input. The junction of the resistors is tied to ground on the layout. Is this really supposed to be grounded? With it grounded the signal is only passed by the 1m2 resistor.