ISO a motorboat

[stajo]

Bad cucumber probably. I flead in to the closest sportsbar. Im gonna go home when I have drunk their beer up and draw a PPP version with no global feedback using Edcor 4k 25 W version that has 0-4-8-16 taps and ground one of the middle ones. "Balanced out concept". I'll post it so you can all make fun of MY distorted brain

I'm thinking floating paraphrase there to. Easyest would be to use same tubbies for splitter but I would prefer something... steeper, is thats the english word for brant? I have some russians, think they are called 6E5P? (im at the pub) what ya think?

 

[flatheadmurre]

I have dug out a PT and a choke togetter with 2 multitapped opts.

It´s now time to find some impossible tubes out of the stash.

All pentode 8 pin perhaps...

There´s a lack of compactrons here so some unfashionable tubes is to be found .

 

[stajo]

Your thinking parallelled build/dev? Would be nice. I have a fistfull or two 6E5P. Heading down to the boat now. Blomman need my XTZ measure equipment so I can burn his MkIV meanwhile.

 

[flatheadmurre]

8 pin tubes and the more unfashionable the better .

Was thinking 6146 but that one is discovered now.

Got a box full of EL36 and on top of that is a box of 6J7.

All pentode 5K opt (cheap is king) plate to grid fb to trick the pentode into faking a triode.

 

[stajo]

EL90s would do a super job in PPP and it counts by the thousends where I'm going. 7 pin, if we shall talk unfashionable

 

[stajo]

Otherwise if wanting cocebottles theres a bunch of AL4 (8 v filament i think) that wouldnt look so bad om output. 6J7 as splitter might be nice

 

[stajo]

If any ideas if propriate splittertubbies anyone, in an FP splitter config, any suggestions are welcome. Im soon in swedens biggest stash

 

[flatheadmurre]

PPP will take a bias servo !

Matching quads or adjusting bias is not interesting.....

A real simple 2 stage non fashion cheapskate amp was my idea.

Good perfomance from dirtcheap tubes.

 

[stajo]

So what is it you have in mind? 813 in triode?

 

[flatheadmurre]

That´s already on my should have finished list .

Tubes must be fairly common, in the stash and not worth any serious money.

Preferable use a 5K OPT (again the cheapest most available).

And of course sound better then a 300B .

 

[stajo]

PL36

 

[flatheadmurre]

The tubes are out, next is a piece of plywood and some testing.




2 stage SE or adding a dualtriode for a LEAK style PP.

I was very spendy and went for EL36 with 6.3 heaters .

 

[stajo]

So. Is it beer in the backyard or have there been any layouts, calcylations, shematics, plank setups yet? Planning on SE or PP? Hows your OPT gapped?

 

[flatheadmurre]

Back from an urgent organ amp repair.

The patient survived surgery and will now live another 40 year or so.

The cheapskate me have a couple of non tube irons on the bench right now.

Spec says 15w 30-20k within 3dB and costed £3.40 and they are a 8K PP in discuise.

It´s cheapest amp challenge .