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Post by jibjab on Jul 17, 2014 20:54:17 GMT
Some great info on here. I've just recently experimented with a valve amp after years in SS world so this all useful.
On lifespan, my EAR phono stage is still on the originals 22 years on...
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Post by Chris on Jul 17, 2014 22:57:20 GMT
What glower are you experimenting with jibjab? Are you liking it?
The dark side is calling....
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colin14
Rank: Duo
Co-fonder of Tellurium Q, Designer and Director of TOCA, and Inca Tech, Magnum, ProAC Magnum, etc
Posts: 39 
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Post by colin14 on Jul 18, 2014 5:59:49 GMT
 This is valve aging. www.tubecollectors.org/eimac/archives/250th(51).pdfI used these to power a ceramic cutting gas laser, gave a pair to my friend Nic from Trilogy with the hope he would make a big amp, but after 10+yrs they are still on the display cabinet. I think the 5V 10A heater PSU worried him. |
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Post by Eduardo Wobblechops on Jul 18, 2014 6:53:41 GMT
Nick (Lurcher) built a 100TH amp a while back for one of the previous Owstons. Sounded great.Lovely looking valves, so well made.
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Post by lurcher on Jul 18, 2014 7:24:57 GMT
The 2kv you need on the anode is no walk in the park either :-). You have to drive those valves hard, if the anode is not running cherry red then they will become gassy. They use the anode as the getter, so it has to be hot enough to work. But to run that hot you need the correct anode and grid connectors that have built in heat dissipating fins, or they will overheat and fail. Makes it hard to make one anywhere close to safe to use outside of an enclosure. They do look nice when running though.
Hi Colin BTW.
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colin14
Rank: Duo
Co-fonder of Tellurium Q, Designer and Director of TOCA, and Inca Tech, Magnum, ProAC Magnum, etc
Posts: 39
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Post by colin14 on Jul 18, 2014 7:33:27 GMT
Hello Nick, I was running is saturation P-P design and I have worked with PSU,s at 100KV+ so 2KV is tiny.
No Nic P. hated high current stuff because he always lost screwdrivers.
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