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  1. dougsta

    1950s valve/tube score to rule them all

    Saw an add in the UK version of craigs list on Sunday, only one photo, looked interesting and the price was £1 and only 15 minute drive into town so couldn't say no, even the wife wasn't too bothered at me bringing old crap into the house as it was only a small box and not a 4x12 cab :) The...
  2. dougsta

    If it's not Scottish it's...

    The time has come and it's well over due, I've owned a Fender M80 1 x 12" ss 80 watter for 30 years, it's UGLY and sounds meh. Time for a full make-over, inside and out (2 x 6V6 or 6L6 type build and can re-use the original chassis and rewind the PT) 1st step is the cab. Before: Told you it...
  3. dougsta

    Tag Strip build of a '63 Reverb Unit 6G15

    I've always wanted a Fender '63 Reverb Unit so it was time to build one. As I have a lot of tag strips I thought I do a point to point build based on them. Here's the DIYLC design completed: Quite a simple build in the end. I used a long 2 spring tank 8Ω input like in the Fender Unit. I...
  4. dougsta

    Another use for 'trash bin' TV diode tubes

    After a successful use of 2 of these old top cap diodes as a full wave rectifier and a 330-CT-330 PT I thought I'd try one of them out as a B+ "warm up" solution for solid state bridge rectified power supply. A 6au4 (octal base) would do the same job, NOS $4 Simply just a case of inserting it...
  5. dougsta

    Lab fun with some old tubes - CV428 beam tetrode (6L6 ish) and PY800 rectifier...

    I scored some old valves as part of an ebay buy for a valve storage box that holds 60 valves, eg EL84/ECC83, £5 inc shipping. The box came with some mostly old 50s/60s TV valves, all working, 4 PL83's (similar to an EL84), lots of PCL83 (triode/pentode a pair can be used for a push pull amp or...
  6. dougsta

    Vibroverb Custom RI - the handwired one, to a DIYLC based build

    I'm thinking of a building a clone of the chassis from the Fender Vibroverb Custom Re-Issue. This is the model produced by Fender a few years back and has stock/Cesar Diaz mods switching and tube/ss rectifying switch. I'd eventually like to add a an extra gain stage switch and effects...
  7. dougsta

    Anyone used these before?

    These are the Loctal base version of the old WW2 vintage 807 valve which I believe is the RF transmitter version of the 6L6. The codes printed on the valve are5B/254M and CV428 (Military designation) I have a bunch of Loctal sockets and anode top caps in the parts drawer, I got these for £5...
  8. dougsta

    Summer project...

    I scored a SS Fender Frontman 212R for £50 (it actually works and has no issues other than it sounds like a SS amp). So now I have a summer project to convert it to a tube amp, the electronics should be straight forward. I'll wind the transformers and a choke. To keep the budget low I'll use...
  9. dougsta

    Transformers - the how, why, when and where!

    I’m hoping this thread will be a community effort on all aspects of transformers, power/output/reverb transformers (not forgetting chokes too) used in our favourite amps/creations. There are suppliers of pretty much all we need in terms of transformers and chokes so why would anyone want to...
  10. dougsta

    Peavey Bandit 112 (USA) to custom job...but what?

    So last January I picked up this nice Peavey Bandit 112 USA Sheffield combo, worked ok except for some of the pots were busted and the normal input jack was looser than a !censored! It also came with 2 guitars, an 80's strat copy with no strings and a cool 60's 4 pickup Japanese curiosity, the...
  11. dougsta

    What do you think of the tone of this low watt amp

    I've just posted about a build I did this week, it's rockin' 3/4 watts from a pair of 1956 Mullard EF80 tubes in push pull! what do you think of the tone (not the playing abilities :) thread is here https://www.tdpri.com/threads/3-4-watt-small-signal-pentode-push-pull-amp.1056788/ Doug
  12. dougsta

    3/4 Watt small signal pentode push pull amp

    We've all seen the low watt amps using 12ax* tubes, my plan it to build something smaller! but also push some old redundant dust gathering RF signal pentodes into creamy push pull output stage distortion at real bedroom level. Interested? Here are some audio clips (zipped mp3 files), one...
  13. dougsta

    Mullard Magic

    Found an old reel to reel tape machine on ebay for £20 and scored some nice Mullards from 1959, inc a long plate ecc83 f92, but what to build? 2 x EL84 1 x ECC83 1 x EF86 1 x EZ90 1 x EM84
  14. dougsta

    Craziest amp component you ever made?

    I (like most folks!) hoard all manner of parts/stuff with the honest intention of using it, maybe just a spare fuse all the way up to a Frankensteins monster build at the edge of my imagination. This also includes finding a use for something which it was not intended, eg a transformer pulled...
  15. dougsta

    Radio to Guitar amp - 1st Schematic and Sound demo

    This follows on from my project to use as much as possible from an old radio (project thread https://www.tdpri.com/threads/my-1st-project-a-1950-philco-radio-made-in-gt-britain.1010252/ ) Here is my version 1 design, I've used the triodes from the 7C6 and 7S7 loctal tubes and the 6V6GT power...
  16. dougsta

    My 1st Project - A 1950 Philco Radio made in Gt Britain...

    Here we have a UK made Philco Model B2852 table radio to donate it's sole for reincarnation as a geetar amp, should make a nice 50s style octal/loctal 5 watter with only the addition of a few components, I'm planning on keeping as much 'mojo' as possible. Back in 1950 the original cost of the...




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