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45 tube SET headphone amps

166.170.14.62
Posted on September 2, 2016 at 10:10:00
aarocks
Audiophile

Posts: 812
Joined: January 26, 2008
 I've read that the 45 tube sounds amazing but I can only find one SET headphone amp with this tube which is from Halgorythme. Are there any others? Has anyone here heard the Halgorythme?

 

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RE: 45 tube SET headphone amps, posted on September 2, 2016 at 11:16:55
OldNuke
Audiophile

Posts: 141
Location: Silicon Valley
Joined: November 18, 2014
 Are you open to DIY? I'm rocking out to a 45 headphone amp as I type this but it's DIY.

 

RE: 45 tube SET headphone amps, posted on September 2, 2016 at 11:39:26
fred76
Audiophile

Posts: 1586
Location: Manila
Joined: February 28, 2004
 Hi,

Maybe ask custom amp builders? There are a few custom builder inmates in this forum who might accomodate you using custom iron. I personally would go for an all DHT 2 stage plate choke loaded 26 DC coupled 45 headphone amp using excellent filament supplies. You could use a high quality input transformer to bump up the gain from (low output impedance) sources..

Regards..

 

Or by a speaker-headphone adapter, posted on September 3, 2016 at 01:54:27
Frihed89
Audiophile

Posts: 15703
Location: Copenhagen
Joined: March 21, 2005
 This allows you to hook up your speaker cables to the adaptor and plug in headphones. Keep in mind that there will be more noise through the adapter. My 45, 2A3 and 300B speaker amps are DC coupled and there is a slight hum, but they sound glorious through headphones.

My adapter was custom built by Blue Circle Audio. It's basically an attenuator with adjustments for both amplifier output impedance and headphone impedance.

 

Schematic?, posted on September 3, 2016 at 09:15:10
Frihed89
Audiophile

Posts: 15703
Location: Copenhagen
Joined: March 21, 2005
 Sounds interesting.

 

RE: Schematic?, posted on September 3, 2016 at 20:49:56
fred76
Audiophile

Posts: 1586
Location: Manila
Joined: February 28, 2004
 Hi,

Yes, but It's not something I designed or drew up myself so I can't post it here. Send me an email through AA and I could reply with an attachment.

Regards..

 

RE: 45 tube SET headphone amps, posted on September 21, 2016 at 17:13:03
tville3
Audiophile

Posts: 140
Location: South Carolina
Joined: March 25, 2001



If your open to building it yourself, here's one I put together. I would definitely use a flywheel power supply if building it today.

 

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