P1800 and PP-18 amplifiers
barry (Administrator) 05-17-2011 at 07:52 PM.
Post: #11
Daniel's modded PP-18

A number of 18W amp builders have wanted the amp's natural overdrive tone at lower room levels. By far the smartest approach is reducing the power supply voltage inside the amp, and Daniel's PP-18 has just such a modification. Called VVR (a MOSFET-based circuit developed by some amp gurus at http://www.hallamplification.com) it adds an extra control to the front panel to control the high voltage inside the amp. [NOTE: Amp Maker will soon be stocking VVR boards and kits from Hall.]

As for the finish: "Fake cowhide... Yeah, I know, but better than the bright orange fur my wife wanted".


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barry (Administrator) 05-17-2011 at 07:53 PM.
Post: #12
Lars' modified PP-18 combo

Lars used the PP-18 as the basis for his ultra-compact 2-channel combo. There's enough juice available from the PP-18's power transformer to power an extra preamp valve and Lars added his own circuit with Treble, Middle, Bass and Master controls. This channel works alongside the PP-18's normal input.


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barry (Administrator) 05-17-2011 at 07:56 PM.
Post: #13
Peter's mini-stack

Peter did a fantastic job of documenting his build with photographs, from opening the box to the finished mini-stack. I'll upload the ZIP file of his photo-album as soon as possible. For the gallery, here's a taster, with the first photo showing some of the chassis planning. This is a vital step for those customers who do not opt for the Time Saver kits, and an hour spent checking positions and clearances and marking up the chassis is time well spent. Peter opted for a super-smooth tolex for his cabinet, shown here atop a 2x12 speaker cab.


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barry (Administrator) 05-17-2011 at 07:59 PM.
Post: #14
Kare's PP-18 combo

The PP-18 amp that Kare bought was a Christmas present for his son. The cabinet he made to house it has a mixture of design cues: thinner ply like '70s WEM amps, salt-and-pepper cloth a la Marshall and protective hardware of the type you see on a lot of independent amp maker builds. "My son is now a convinced valve amplifier enthusiast."


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barry (Administrator) 05-17-2011 at 08:01 PM.
Post: #15
Rafaele's PP-18

Here's another vote for the beauty of a natural wood finish: a simple pine box ("sanded hard - I have pain in every muscle in my body!"). The finishing touch is cool - a "PP-18" logo made up from metal lettering from a car accessories shop.

Very kindly, Raf has also uploaded some videos to YouTube. They show just how well the PP-18 responds to the way you play and to the guitar control settings:





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barry (Administrator) 05-17-2011 at 08:02 PM.
Post: #16
JE's 1x12 PP-18 combo

For JE's 1x12 18W combo, he opted to adapt the layout so that the valves hung downwards - i.e. at right angles to what would be the chassis' back panel. This means fitting them into a tighter space than they would otherwise take up, but JE found no problems. A side benefit is that there's more space for the turret board and its associated wiring.


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barry (Administrator) 05-17-2011 at 08:04 PM.
Post: #17
Peter's distressed head

There's one sure-fire way to avoid getting scuffs and tears on a newly made cabinet - start with a cabinet that's already distressed. That was the approach that Peter took with his PP-18 amp build. It has some nice details, too, such as the three circular vent holes in the front and back panel cut out for the mains and speaker sockets. "The guitar sounds ******* magic through the PP-18. Brought a smile - especially the neck pickup. Drove me to a couple of Hendrix riffs right there stood on the settee (wife'll get me for that)."


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barry (Administrator) 05-17-2011 at 08:06 PM.
Post: #18
Tomeu's PP-18 head

I'm in awe of Tomeu's build. I pride myself on neat layouts, but Tomeu's PP-18 goes beyond anything I've done and just about anything that you'll see from top-dollar boutique amp makers. The care and attention to detail are terrific. I like Hiwatt's ultra-tidy style of layout and lead dress, but this is something else.


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barry (Administrator) 05-17-2011 at 08:17 PM.
Post: #19
Diego's PP-18 head

Diego's another first-time amp builder who also made the cabinets for his amp project - both head cabinet and the matching speaker cabinet. If you're in Mallorca, check out Diego's band, The Red Suns. I'll get there one day, Diego!


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barry (Administrator) 05-17-2011 at 08:34 PM.
Post: #20
Angus' be-denimed PP-18

This is as unique as it is wacky: an amp covered in denim instead of tolex. Well, if tweed's good enough for old Fenders, why not denim for a rocking amp? "I tried my best to get the front seam straight but it wasn't having it!"


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