deHavilland ultraVerve Line Amp

[CJ]

4 inputs, for your audio devices, gain of about 3,

$2500 , fancy rusky oil caps for outputs, direct coupled, light bulbs for cathode resistors, solid magnet wire hookup,

fancy input atten,

 

[CJ]

elevated to 80 volts DC heaters,

timed relay for B+, about 22 seconds.

 

[CJ]

tube rect,

 

[CJ]

output caps

 

[CJ]

solid copper feeds input atten

 

[CJ]

and thats about it,

 

[Brian Roth]

CJ.....what the heck is that? I guess it's some sort of high end audiophool device. Or is it a one-off?

Bri

 

[CJ]

Yeah pretty crazy on the cathode lamps, stolen from HP SIG gen

 

[Gus]

WOW

IC cap and JACKCON cap? A power resistor on top of cap?

Polyamide coated magnet wire wires?

Is that a Radio Shack protoboad?

I don't like tywraps for final builds they age and will break.

Flux on shunt to ground control, 100 ohm loading at one setting?

No pull down cap on the output cap and if that is a paper and oil cap that is not made with good paper it can leak and cause noise from the way the output volume is wired.

The two transformers are at 90 degrees however, they are close together.

No regulation on the heater supply? Good NOS tubes are getting harder to find and US wall voltages seem to be 120VAC and up sometimes.

Are the light bulbs for compression and/or limiting of some kind?

 

[musipol]

Don't most filament type lamps increase resistance as they heat up? If so that would probably lower the gain. Would be a slow time constant though.

 

[CJ]

ok i put this schemo back up as the manufacturer hashised to exist, ,

 

[CJ]

i tried it out and it does seem to add musicallity to a digital sourced file ie mp3,

but i think $2500 is too much for about 200 dollars worth of parts, and the construction is kind of diy looking,

no wait, those Goldpoint switches ae $246 a piece, and the gold plated RCA's are probably spendy,

 

[rock soderstrom]

and the construction is kind of diy looking,

+1

I think it looks a bit too DIY for the money. I've seen this done better with P2P amps in the same price range. Thanks for reupload of the schematic

 

[CJ]

well they know that those audio snobs are never going to open it up, might upset the capacitance!