45 Tube amp project

[Brett]

Originally posted by slowmotion
" I confess to having impure thoughts though; I've been looking at an 813 verion of the Outerlimit, a parafeed . Oh, the shame of it all. "



Tell us more?

cheers

I've been looking at the Outerlimit a sort of Sakuma cross parafeed SE amp. I admire Benny and Stephane's mondo gonzo approach to building amplifiers, and I think a trioded 813 could do very well in a similar output configuration. I already have the OPTs, and can source some 150H/150mA C core platechokes, so I thought it might be interesting to try. The platechokes aren't cheap, and I don't know if parafeed will be any better sounding than the SETs I've heard in the past (which I didn't like). If I could borrow the chokes for a couple of weeks, it'd be perfect, but unfortunately I have to buy them, and I have no idea whether I'll like it, and the chokes aren't much use otherwise. So, I'm stuck with it as a thought project at the moment.

Thinking for topology so far was,
12B4A resistive or CCS loaded, RC coupled to a 12E1/KT88/807 (trioded) CCS loaded via parafeed IT to 813 trioded running about 900V/110mA into a 6k or 11k5 OPT.
Alternative drivers might be an EL84 pentode, or a 6C45 resistive or CCS loaded, parafeed IT to the 813.
Designs are chosen for what I have on hand.

I'd leave space for the filament supply and jumbo socket for an 813/845 driver later.
Power would be around 25W.

Very 'blue sky' at the moment, especially as I like my 813PP so much.

I might start a new thread on parafeeds.

[fdegrove]

Hi,

I might start a new thread on parafeeds.

Hmmm, that would be interesting.

I activated the sprinklers already.

Cheers,

[James D.]

Hi Brett,

My wife vetoed the horns - she really didn't the look at all! The Quasars will be in a room similar to yours - 18m*12m*3m - no vaulted ceiling though. They are 98dB/1W/1m and like being away from the walls. Given the open sound nature of open bafles I have high hopes for them...

Your 813 parafeed sounds interesting - start the thread - I've got a tin hat out now...

ciao

Jmaes

[Brett]

Originally posted by James D.
Hi Brett,

My wife vetoed the horns

That's grounds for divorce around here. Oh, that's right I'm not married.....

Your 813 parafeed sounds interesting - start the thread -

I will in a minute.

I've got a tin hat out now...

ciao

Jmaes

I have an aluminium foil deflector beanie. It stops the aliens controlling my mind.
It's DIY, so you can make one too.

[siu sin man tho]

hi,

very sorry what is the meaning of tin hat.
I don't understand is it related to the horn.........

thanks
thomas

[Brett]

Originally posted by siu sin man tho
hi,

very sorry what is the meaning of tin hat.
I don't understand is it related to the horn.........

thanks
thomas

Hi Thomas,

I think James meant 'tin hat' to mean 'army helmet' because he had a controversial view and was protecting himself from the rocks of argument he expected people to throw at him.

Of course, I was just trying to be funny.

Cheers

[James D.]

Hi Thomas,

Brett's explaination is correct.

In Brett's parafeed thread I have been rude about parafeed and I anticipated some rude remarks coming my way. Parafeed seems to provoke fierce debate on most forums - but not here. In fact my rude remarks have been ignored and that shows how mature most of the members here are... or more likely how silly my remarks were

ciao

James

[siu sin man tho]

hi james,

P.S this is not promotion!!!!!!!!!!

recently I use japan 4N copper to raw the red copper terminal/
Do U feel good. Pls give me some advise.

thnaks

Thomas

[siu sin man tho]

to the planet.

this is the wooden chassis that i use vintage eastern craft with piano finish to make it. Do U feel good.

P.S. This is not for promotion, only for sample & want to get advise.
I hope I use heart of diyer to make diy product will good to diyer.

thanks

Thomas

[James D.]

Hi Brett,

Latest on my Quasars is that I have the speaker units and knocked up a cardboard baffle for them...very sophisticated!!!



They sound fantastic! Very open and dynamic and so, so natural. I'm driving them with my ECL82SE amp in triode mode (1.6W!!!) This is better than my WAD 2A3PSE .

My 6B4G pp was 'off the road' last night as I blew up the psu...

ciao

James