DCAudioDIY.com

DC Area Audio DIYer's Community
It is currently September 24th, 2020, 1:22 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: 45 SET Stereo Amplifier
PostPosted: October 17th, 2019, 8:10 am 
Offline

Joined: February 28th, 2013, 1:19 pm
Posts: 484
For Sale, a 45 SET Amplifier based on the Gordon Rankin "Bugle" circuit.
2W output. Perfect for super high efficiency speakers (tweeter or midrange horn in multi-amp setup).

Fine working condition, just a bit dusty from storage.

12AY7 or 5751 SRPP cap coupled to the 45 output tube.
Tube Rectifier
AC heater with hum pot on the 45
All oil-cap power supply (PP in oil motor run caps)

5K/10W Electraprint output transformers.

Handmade wooden chassis.

Complete with pair of vintage GE 45. Mullard GZ34 rectifier (shown) not included, but will substitute a Sovtek or Chinese GZ34.

$500. Local pickup only.


Attachments:
20191017_060703.jpg
20191017_060703.jpg [ 826.11 KiB | Viewed 3353 times ]
20191017_060649.jpg
20191017_060649.jpg [ 656.72 KiB | Viewed 3353 times ]
Top
 Profile  
 
PostPosted: September 2nd, 2020, 9:56 am 
Offline

Joined: February 28th, 2013, 1:19 pm
Posts: 484
Sold.


Top
 Profile  
 
PostPosted: September 2nd, 2020, 10:02 am 
Offline
User avatar

Joined: July 24th, 2015, 4:17 pm
Posts: 1249
Location: Parkville, Maryland
David McGown wrote:
Sold.

That was a buy of a lifetime!! NICE!

Here is a listing for a commercially manufactured version:

https://www.ebay.com/i/254485541545?chn ... MuEALw_wcB

_________________
Walt


Top
 Profile  
 
PostPosted: September 2nd, 2020, 10:53 am 
Offline

Joined: February 28th, 2013, 1:19 pm
Posts: 484
Walt,

It was sold to a friend in the DCAudioDIY community who will appreciate it. The amp you linked to uses expensive Emission Labs 45 tubes, 76 drivers, DC heaters on the 45s (current source?). More sophisticated than the simple and inexpensive Rankin based design posted in Sound Practices that I built years ago. I believe it is rather overpriced given the obvious chassis damage (or poor construction) and use of good, but not top quality output transformers (James).

David


Top
 Profile  
 
PostPosted: September 2nd, 2020, 11:42 am 
Offline
User avatar

Joined: July 24th, 2015, 4:17 pm
Posts: 1249
Location: Parkville, Maryland
David McGown wrote:
Walt,

It was sold to a friend in the DCAudioDIY community who will appreciate it. The amp you linked to uses expensive Emission Labs 45 tubes, 76 drivers, DC heaters on the 45s (current source?). More sophisticated than the simple and inexpensive Rankin based design posted in Sound Practices that I built years ago. I believe it is rather overpriced given the obvious chassis damage (or poor construction) and use of good, but not top quality output transformers (James).

David


As it turns out I got a major improvement with my Carys by upgrading to Emission Labs mesh-plate 300Bs.

It wasn't even a contest between those and my other 300Bs.

http://www.emissionlabs.com/datasheets/ ... -mesh.html

So -- at about $700 per pair for the EML 45s alone, the store bought 45 SET amps. may not be such a bad buy after all.

I am after all a vacuum-tube addict (valves). :ugeek:

_________________
Walt


Top
 Profile  
 
PostPosted: September 2nd, 2020, 2:02 pm 
Offline

Joined: February 28th, 2013, 1:19 pm
Posts: 484
I just did a Google search, and found the builder of the amp for sale on eBay is a custom builder (Radu Tarta) up in Norwich, Connecticut. Apparently he uses goodies like Coleman DC regulators for the filaments, and the build quality appears to be quite high. His other equipment looks very nice. Still, alot for 2W, but in the right horn-based system, it could be magic.

David


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group