Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Cliff Rogers on February 28, 2025, 06:56:28 pm

Title: 6N5P Russian made
Post by: Cliff Rogers on February 28, 2025, 06:56:28 pm

Anybody tried using these in a preamp?
Low gain, approximately 27, twin triode.
Should be similar to a 12AU7 with different heater pin out requirements and the current draw is also higher.
https://frank.pocnet.net/sheets/113/6/6N5P.pdf

Title: Re: 6N5P Russian made
Post by: kagliostro on March 01, 2025, 02:00:45 pm

When I want a comparision between russian and USA/EU tubes I go to https://tubes-store.com (https://tubes-store.com)

They sell russian tubes and refer to the correspondent USA/EU tubes

but about your tube, the 6N5P no comparision is made and so I suppose that that tube hasn't a correspondent

https://tubes-store.com/product_info.php?products_id=674 (https://tubes-store.com/product_info.php?products_id=674)


--


Other seller say there is correspondece with some USA/EU tubes but seems odd to me that at tubes-store they ignore that (???)


https://soviet-tubes.com/product/russian-6n5p-double-triode-tube-with-separate-indirectly-heated-cathodes-low-frequency-preamplifier-near-analogue-6au7-7au7-ecc804-b729-6ga8/?srsltid=AfmBOooOOWhVY6MRrL3fJybYYNak36MpEcEz0u7fybLZEHq75d0G4zyJ (https://soviet-tubes.com/product/russian-6n5p-double-triode-tube-with-separate-indirectly-heated-cathodes-low-frequency-preamplifier-near-analogue-6au7-7au7-ecc804-b729-6ga8/?srsltid=AfmBOooOOWhVY6MRrL3fJybYYNak36MpEcEz0u7fybLZEHq75d0G4zyJ)

Franco

Title: Re: 6N5P Russian made
Post by: HotBluePlates on March 01, 2025, 06:28:44 pm

Quote from: Cliff Rogers on February 28, 2025, 06:56:28 pm

Should be similar to a 12AU7 with different heater pin out requirements ...
https://frank.pocnet.net/sheets/113/6/6N5P.pdf (https://frank.pocnet.net/sheets/113/6/6N5P.pdf)

Quote from: kagliostro on March 01, 2025, 02:00:45 pm

...

but about your tube, the 6N5P no comparision is made and so I suppose that that tube hasn't a correspondent

https://tubes-store.com/product_info.php?products_id=674 (https://tubes-store.com/product_info.php?products_id=674)

Judging from data sheet curves, the 6N5P is close to a 12AU7, but not quite the same.


I've never used one because I have no trouble finding a 12AU7 for the rare cases when I need one.

Title: Re: 6N5P Russian made
Post by: jansch on March 02, 2025, 09:56:53 am

www.radiomuseum.org says the tube is equivalent to 1539 but in different quality class (probably consumer as opposed to military).