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Would 7355 OPTs work for PP triode 6AQ5?

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Posted on January 13, 2017 at 07:22:25
bcguitar
Audiophile

Posts: 1328
Location: Maryland
Joined: March 2, 2005
 looking at a pair of Bogen output trannies from a RPF60. Or I have UTC S-15s. Thanks for any help!

 

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RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 13, 2017 at 07:40:02
Eli Duttman
Audiophile

Posts: 10455
Location: Monroe Township, NJ
Joined: March 31, 2000
 Based on the 7355 data sheet, I would say NO.

That "iron" should be OK with the EL34/6CA7/KT77 group, in triode.


Eli D.

 

RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 13, 2017 at 07:41:44
bcguitar
Audiophile

Posts: 1328
Location: Maryland
Joined: March 2, 2005
 I figured it was a long shot, thanks!

 

RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 13, 2017 at 14:33:04
sony6060
Audiophile

Posts: 1465
Location: USA
Joined: August 8, 2014
 Dynaco Z-565 output transformers would be great.

 

RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 13, 2017 at 17:10:44
bcguitar
Audiophile

Posts: 1328
Location: Maryland
Joined: March 2, 2005
 those are tough to find cheap. what about these S-15 UTC?

 

RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 13, 2017 at 17:31:13
sony6060
Audiophile

Posts: 1465
Location: USA
Joined: August 8, 2014
 S-15 10000K primary to 8 ohm would work.

 

RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 13, 2017 at 17:31:49
Eli Duttman
Audiophile

Posts: 10455
Location: Monroe Township, NJ
Joined: March 31, 2000



If you are willing to incorporate a GNFB loop, to ensure that the amp is linear at the audio pass band extremes, Edcor's GXPP15-8K will be FINE for triode wired 'AQ5s or any other 6V6 family tube. The GXPP15-8K is acceptable in an "El Cheapo", but you MUST tie the UL taps off. TANSTAAFL!


Eli D.

 

Thanks 6060!, posted on January 13, 2017 at 18:45:14
bcguitar
Audiophile

Posts: 1328
Location: Maryland
Joined: March 2, 2005
 .

 

RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 16, 2017 at 09:27:58
PakProtector
Audiophile

Posts: 12364
Joined: May 14, 2002
 The UTC 'S' series in not their high bandwidth offering. Look to the LS series; LS52 or LS54 IIRC, one has a 600R winding, you will probably want the other one.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.

 

RE: Would 7355 OPTs work for PP triode 6AQ5?, posted on January 16, 2017 at 14:50:50
Tom Bavis
Audiophile

Posts: 961
Location: Upstate NY
Joined: May 25, 2007
 I'd expect the 7355 transformers to be about 4K primary. I have a pair of 4K Schumachers that measure fairly good, and have thought about using push-pull parallel 6AQ5s. Four or six per channel? Either way, I have enough output tubes for several lifetimes.

 

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