CC Source in a Spud?

We all start somewhere
User avatar
Dave the bass
Amstrad Tower of Power
Posts: 12272
Joined: Tue May 22, 2007 4:36 pm
Location: NW Kent, Darn Sarf innit.

#16 Re: CC Source in a Spud?

Post by Dave the bass »

Yeah, I want to learn a bit more by reading then asking then doing. There might be an odd 'hurrrumph' thrown in for good measure too occasionally but I don't where that might fit in the proceedings currently. Mind you, it'd be great if good sounds come out of it too as a bonus.

Aaaah, i/p TXs, double ahaha's, I assumme thats only a good thing if the source can actually drive a transformer.
"The fat bourgeois and his doppelganger"
Andrew
Eternally single
Posts: 4206
Joined: Thu May 24, 2007 2:18 pm

#17 Re: CC Source in a Spud?

Post by Andrew »

No input TX, 6C45 was CCS loaded into a para-fed and gapless output TX.

hope that helps.

Andrew
Analogue, the lost world that lies between 0 and 1.
User avatar
pre65
Amstrad Tower of Power
Posts: 21367
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#18 Re: CC Source in a Spud?

Post by pre65 »

So, gapless would imply a PP output transformer ?

If it's any help Dave you can have my pair of Hammond 125D universal output transformers.

Details here.

http://www.hammondmfg.com/125a.htm
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
Nick
Site Admin
Posts: 15694
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#19 Re: CC Source in a Spud?

Post by Nick »

So, gapless would imply a PP output transformer ?
No, it could just be wound for parafeed operation.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
Andrew
Eternally single
Posts: 4206
Joined: Thu May 24, 2007 2:18 pm

#20 Re: CC Source in a Spud?

Post by Andrew »

Yes, Nick's right, it was wound for parafeed, hence no gap, so more inductance and hopefully better bass.

The 6C45 was shunt regulated too.

Andrew
Analogue, the lost world that lies between 0 and 1.
User avatar
Dave the bass
Amstrad Tower of Power
Posts: 12272
Joined: Tue May 22, 2007 4:36 pm
Location: NW Kent, Darn Sarf innit.

#21 Re: CC Source in a Spud?

Post by Dave the bass »

Ah right, ta AndrewL.

Gapless OP TX as there's no DC standing current for it to handle I'm guessing? I did a Parafeed a long time ago and 'got away' with mains torroids as OP TX's.

I went off for ride again yesterday, hence no updates for a day or so. I've made a start though, whahey.
"The fat bourgeois and his doppelganger"
User avatar
Mike H
Amstrad Tower of Power
Posts: 20156
Joined: Sat Oct 04, 2008 5:38 pm
Location: The Fens
Contact:

#22 Re: CC Source in a Spud?

Post by Mike H »

Dave the bass wrote: Sun Jul 16, 2017 10:24 am Ah right, ta AndrewL.

Gapless OP TX as there's no DC standing current for it to handle I'm guessing?
Yes.
I did a Parafeed a long time ago and 'got away' with mains torroids as OP TX's.
I did some years back, used humungous p-p OPT's, 350H I think, or someting like Worked OK but of course the limiting factor is the inductance of the anode choke.
 
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
User avatar
Nick
Site Admin
Posts: 15694
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#23 Re: CC Source in a Spud?

Post by Nick »

Not if you use a ccs
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
Mike H
Amstrad Tower of Power
Posts: 20156
Joined: Sat Oct 04, 2008 5:38 pm
Location: The Fens
Contact:

#24 Re: CC Source in a Spud?

Post by Mike H »

Yep, but never got that far.
 
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
User avatar
pre65
Amstrad Tower of Power
Posts: 21367
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#25 Re: CC Source in a Spud?

Post by pre65 »

I've been doing some research on "powerdrive" for the 833a, and came across a thread on DIY Audio for an 833a spud amp. :shock:
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
andrew Ivimey
Social Sevices have been notified
Posts: 8305
Joined: Mon Jun 11, 2007 8:33 am
Location: Bedford

#26 Re: CC Source in a Spud?

Post by andrew Ivimey »

Ha! If you' re preamp is sufficiently protected from dc, with a few watts of power the 833 could be one hell of a 'tater amp.
Philosophers have only interpreted the world - the point, however, is to change it. No it isn't ... maybe we should leave it alone for a while.
User avatar
Nick
Site Admin
Posts: 15694
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#27 Re: CC Source in a Spud?

Post by Nick »

I've been doing some research on "powerdrive" for the 833a, and came across a thread on DIY Audio for an 833a spud amp. :shock:
But if that counts as a spud amp, then any single output valve with a solid state driver (of any complexity) would also meet the requirements. For that matter, a solid-state amp with a ecc83 at the front would fit.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
andrew Ivimey
Social Sevices have been notified
Posts: 8305
Joined: Mon Jun 11, 2007 8:33 am
Location: Bedford

#28 Re: CC Source in a Spud?

Post by andrew Ivimey »

Fairy nooff, so..........how could one make an 833 spudamp in the same manner as e.g. Andrew's 6s45 spudderoo?
Philosophers have only interpreted the world - the point, however, is to change it. No it isn't ... maybe we should leave it alone for a while.
User avatar
Nick
Site Admin
Posts: 15694
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#29 Re: CC Source in a Spud?

Post by Nick »

You can't unless you allow a source follower to drive the grid.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
andrew Ivimey
Social Sevices have been notified
Posts: 8305
Joined: Mon Jun 11, 2007 8:33 am
Location: Bedford

#30 Re: CC Source in a Spud?

Post by andrew Ivimey »

I was thinking the same sort of thing bit what's the point.
Philosophers have only interpreted the world - the point, however, is to change it. No it isn't ... maybe we should leave it alone for a while.
Post Reply