Scratchbuilt amplifiers (not kits)
barry (Administrator) 05-17-2011 at 01:26 AM.
Post: #21
Mike Howson's Princeton with VVR

"Hope you are keeping well. The Princeton was finally finished 3 to 4
weeks ago. I've attached a few photos as I thought you may like to see the end result. In the amp are a selection of your parts - PT, some of the
Switchcraft jack sockets, the turret board, orange drops, valve sockets,
chicken head knobs, valves, and probably a few other things I've forgotten.

"It all took very much longer than planned, but has worked out well and
sounds very good. It may be smaller than the SE-5A combo I built, but it
still hardly qualifies as light!"

Very pretty combo and I really like the details - including the engraving of the Terry Pratchett quote on the back. Mike also added VVR - a circuit for reducing the amp's power output by lowering the power supply voltage.

Attached File(s) Image(s)
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barry (Administrator) 05-18-2011 at 08:18 PM.
Post: #22
Aleksi Sandqvist's 6V6 amp

Using Amp Maker's 0-190-275V mains TX and 18W output TX, Aleksi has built another amp from scratch. Once again, hes also used the PTFE (teflon) board to quickly make up small boards.

"I built an amp during the Summer with a parallel 12AX7 (bright and dark voicings) driving an EF86 with a pair of 6V6s in the PA. Quite versatile with independent Bass and Treble controls later in the amplifier."

Attached File(s) Image(s)
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barry (Administrator) 10-25-2011 at 04:56 AM.
Post: #23
Aleksi does it again! Smile

One man with a serial amp building habit, Aleksi has again used multiple PTFE boards for different parts of the circuit. It's another very busy amp chassis.

"I attach a few pics of my latest build. It still needs some tweaking with the reverb and the power control, but it's 99% done. After giving away my last amp with 12ax7 / ef86 I wanted one for myself.

"Aleksi's trademark is using an EF86 in the middle of the preamp (compared to vintage Vox amps that used them as the amp's first stage). "The amp has a 12ax7 driving an ef86 (surprise!!) into LTPI into push-pull 6V6. It also has a Belton digital reverb module (under the turret board) along with output power control." The latter uses the Amp Maker 0-190-275V mains transformer.

As you can see, Aleksi's another fan of the Tokai Love Rock.

Attached File(s) Image(s)
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barry (Administrator) 06-15-2015 at 12:23 AM.
Post: #24
Andy's Princeton build
"Here are some pics of my Princeton, I finished it yesterday. Built with your PTFE board and turrets. She sounds fantastic - unfortunately she's sold already, so I only got her for another week."

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barry (Administrator) 06-15-2015 at 12:32 AM.
Post: #25
Ben's ... unusual ... cassette player amp
"Just wanted to say thanks for the great service and fast despatch. The PTFE wire worked great in my DIY Hybrid valve amp / Cassette player.

"The Amp is a 12AU7 / 50EH5 setup and the cassette is open top with a Philips TDA1522 preamp IC."

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barry (Administrator) 06-15-2015 at 02:01 AM.
Post: #26
Adelino's self-made SL-18
"The circuit is very similar to the SL-18 with a few changes that make it more like the Orange Tiny Terror with separate tone controls. The volume is after the phase inverter and the gain is also a double pot that joins the gain and volume of the SL-18.

"Also added the switchable output mod wich is very usefull to play at home (the main use). The speaker is an original G12-65 from the '80s."

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barry (Administrator) 06-15-2015 at 03:33 AM.
Post: #27
Greg's high gain wedge
"I love my 5watt high gain monster. I decided to build a wedge...why? It just made sense, my main amp spends most of its time tilted back at 45 degrees facing up at me with a mic in front of it.

"Donor chassis, everything else I did. Cabinetmaker by trade. First time upholsterer. I used automotive vinyl roofing (really tough stuff)."

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barry (Administrator) 06-24-2015 at 12:32 AM.
Post: #28
Simon's HRD reborn...

"Many thanks for the swift dispatch, order safely received today. I'd accidently turned my Hot Rod Deluxe into a useless pile of junk by swapping a few components in order to “improve” it but actually resulting it in producing an ear splitting hum/roar every time it was switched on… The final solution was to rip to out the whole lot, retaining the cabinet, chassis, iron and the mains bits and bobs and, using your marvellous threaded turrets and turret board and other components from your website, rebuilt the whole thing.

"I based it on the normal “channel” of an AB763 Super Reverb circuit, splicing in the reverb. I used up the little holes in the faceplate by adding a few little switches to switch the V1 cathode, the NFB and a tone stack by-pass. The tube driven reverb needed a different tank, and also involved drilling a hole for an extra tube. I didn’t go as far as putting in a tube rectifier (no 5V on the PT) but did get suckered into getting a Weber Copperhead which meant drilling another hole. (It’s a handy place to keep the diodes, I’ve got a ready-made hole if I want to swap it for a tube rectifier in the future, and it looks kinda cool).

"The other major change was the speaker and I swapped if for a Warehouse G12a, which just about fitted. I’ve not added a presence control just yet and the effects loop holes are blanked off – but the reverb is footswitchable. I doubt it sounds anything like a real Super Reverb as I didn’t get the proper transformers and it’s not 4x10 speakers, but I think it sounds marvellous, particularly compared to the original, (which was not bad for a mass produced amp).

"The wiring was not as neat as I would have liked (partly due to me putting the pre-amp valves the wrong way round and having to cross the wires coming from the board – arggh!) But other than that I’m pretty pleased with it!

I’ve included a shot of the original stock HRD innards for a 'before and after'. My next build is to do something similar with a little single ended 6v6 amp I’ve had sitting round for a while (currently an Electar 6L6) and I’m also doing an 18W clone build but using a cage cabinet."

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barry (Administrator) 06-24-2015 at 12:43 AM.
Post: #29
Malcolm's scratchbuilt 18W TMB and SE amps

"Some pictures of my 18 watt TMB Super Lite build, the first finished amp, front and back, and the second complete chassis which I have assembled and soldered plus tested ok.


"The next next pictures show my 6v6GT single ended stereo, top and bottom view."

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barry (Administrator) 06-24-2015 at 09:57 PM.
Post: #30
Tim's first amp and first build

"The amp is all finished now, picture attached. It's a 5W single-ended Class A design using mostly your parts taken from a US kit schematic, with EL84 Power Tube, ECC83S pre-amp tube. It sounds great. It has volume bass and treble. You really can dial in any tone you want.

"I made the cabinets from pine (oak was too expensive) I then coated the wood in a dark oak beeswax and finished off with beeswax polish, really pleased with the finish. Looks like a expensive bit of kit for the fraction of the cost of hardwood. I used a very simple interlocking joint that with a bit of time and care anyone can do and looks great.

"The chassis was made from aluminium as it is easy to bend and with only a vice. The grills are made from mild steel purchased from B&Q, they have quite a retro patern to them. I just applied clear lacquer to these to keep the mild steel colour.

"The cab is an open back fitted with a Jenson P10R Alnico, mixed reviews can be found online but I must say I love it, Some say it's too bright but this matches my amp well. It breaks up into highly compressed distortion quite early and with finesse. Allot of fun to play.

"Took me 3 weekends to complete everything is hand made from scratch (chassis etc..) I have only been playing guitar for 6 weeks but couldn't find a amp that I liked so built one." Smile

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