#102 Voltage Chart?

[JazzGuitarGimp]

Hi Everyone!

Can someone please point me in the direction of the RF #102 Voltage Chart (if it exists)? If it doesn't exist, can anyone tell me what to expect at the five B+ nodes?

Thanks!
Lou

[LeftyStrat]

Hi Everyone!

Can someone please point me in the direction of the RF #102 Voltage Chart (if it exists)? If it doesn't exist, can anyone tell me what to expect at the five B+ nodes?

Thanks!
Lou

I don't have the info, but I sure would like to have it. I'm trying to spec a PT for a Dumble dual preamp and this would help me also.

So I'm popping some popcorn and pulling up a chair.

[David Root]

With a BF Twin PT, B+1 ~450V, B+2 ~450V, B+3 ~425V, B+4 ~320V, B+5 ~310V. The original 102 had ~460V B+1 but it did not use a BF Twin PT.

On my build, PI plates 288-292V, V2 200-210V, V1 high 190s to 205V, using the HAD dropping resistor values and an 022699 choke.

I also have a buffered internal loop and those B+ voltages are 240V on the CF and 345V on the recovery stage, both of which are right on the money with the Claus-umbelator schematic. 47K dropper on the screen node to 345V then 82K to 240V.

[LeftyStrat]

With a BF Twin PT, B+1 ~450V, B+2 ~450V, B+3 ~425V, B+4 ~320V, B+5 ~310V. The original 102 had ~460V B+1 but it did not use a BF Twin PT.

On my build, PI plates 285-290V, V2 200-210V, V1 high 190s to 205V, using the HAD dropping resistor values and an 022699 choke.

David, thanks so much for this info.

[JazzGuitarGimp]

Thank you big time mucho, David!

[ToneMerc]

I don't have the info, but I sure would like to have it. I'm trying to spec a PT for a Dumble dual preamp and this would help me also.

So I'm popping some popcorn and pulling up a chair.

You really don't need that amount of detail info for a preamp supply, really the half the voltage chart won't even apply. All you need is any PS scheme that will give you a 350-400 VDC loaded supply at around 30-40mA and maybe 1.5A on the filaments if you are doing a built in loop. If it's something relativity simple, just use a Fender standalone reverb PT.

Something like this would mostly cover whatever you had in cooked up, plus more.

300-300 @ 50mA (over 400+V unloaded as FWB)
6.3 @ 350mA (relays)
6.3VCT @ 2A (filaments)

TM

[talbany]

Hi Everyone!

Can someone please point me in the direction of the RF #102 Voltage Chart (if it exists)? If it doesn't exist, can anyone tell me what to expect at the five B+ nodes?

Thanks!
Lou

The voltages (including bias) are all on the Layout!!

https://tubeamparchive.com/download/file.php?id=20659

Tony