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Old 28th April 2003, 04:55 PM   #1
cdeveza is offline cdeveza  United States
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Default Parafeed Circuit

Like to try SE parafeed circuit, anybody knows where I can find a good parafeed circuit I could try?

Thanks,
Alex Deveza
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Old 28th April 2003, 05:16 PM   #2
Joel is offline Joel  United States
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I just built this, and I like the performance so far.
The choke labled "1.8k ohms" is actually the primary of a Fender spring reverb driver tranny from a Deluxe Reverb reissue. It's probably around 30 Henrys.
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Old 29th April 2003, 12:42 AM   #3
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Default PARACHUTE...

Hi,

Quote:
Like to try SE parafeed circuit, anybody knows where I can find a good parafeed circuit I could try?
Any half decent SE amp is a parafeed candidate depending on what OPT type you to use.

Read: can't afford the right OPT for the job? Try parachute technology using a regular PP OPT and prevent DC on it by using a coupling cap, never measure anything anymore and according to some this presents the nec plus ultra...

Ok...just stopped laughing, almost fricking choked.

Fair enough some good SE exist but I can get better results with half the working budget though.

O.K. I'm back to the bunker...
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Old 29th April 2003, 01:29 AM   #4
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Head over to Bottlehead.com. You should be able to glean some information over there. I was under the impression they pioneered parallel feed although they are more into the parallel feed kit business. But you can opt to buy just the construction manual and schematic for their 2A3 and 300B kits.

Also you can check out their Valve magazine which has designs that I would imagine involve parallel feed from time to time.

If nothing else, you might find some links to other sites with PF info.
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Old 29th April 2003, 02:30 AM   #5
Joel is offline Joel  United States
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Quote:
Originally posted by ultrachrome
Head over to Bottlehead.com... I was under the impression they pioneered parallel feed...
Not unless they were around in the early 1930's.
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Old 29th April 2003, 05:21 PM   #6
cdeveza is offline cdeveza  United States
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Thanks Joel,

I am actually looking for a circuit that uses 300B though.


UltraChrome:

Bottlehead does not publish their circuits, would be nice though.


Thanks guys,
Alex Deveza
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Old 29th April 2003, 06:00 PM   #7
Joel is offline Joel  United States
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Quote:
Originally posted by cdeveza
Thanks Joel,
I am actually looking for a circuit that uses 300B though.
Ahh. Yes... I can see how the decreased transconductance, increased plate resistance, oddball filament voltage, and enormous pricetag would be appealing...
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Old 29th April 2003, 08:51 PM   #8
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I did not mean to imply they invented it. But Doc does have some gray hair. Maybe he's older than he looks.

You can buy the schematics/construction manual from them for $15. And you can get good support at the Bottlehead forum which is completely free of and .
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Old 29th April 2003, 09:00 PM   #9
cdeveza is offline cdeveza  United States
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Joel,

Well, actually i just happen to have them on hand, not really looking forward to buying one.

Alex
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Old 29th April 2003, 10:37 PM   #10
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Default HAVE A LOOK INTO MY WALLET...

Hi,

Quote:
Well, actually i just happen to have them on hand, not really looking forward to buying one.
And I suppose it's your right to spend your money as you feel fit.

MC Hammer at work:


Quote:
Ahh. Yes... I can see how the decreased transconductance, increased plate resistance, oddball filament voltage, and enormous pricetag would be appealing...
Look at your own circuit for a change, silly.
And FWIW, any circuit is meaningless without it's PSU...guess it's going to take you an other fifty years to grasp that?
Not that you'd hear a difference...

Joel, Joel...how much longer? Is it so hard to put your cheapskate ego aside?

Be a sport for a change and we might just reach out and help you too.

Blimey,
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