Water Cooled Amps

[Riverman]

Found these at http://www.parelectronics.com/index.php under one of the W4OP links at the top right of the page. Some of you may be familiar with the concept, but I sure wasn't. I was blown away but the idea of a paddle wheel indicator on an amp.
Dale Parfitt (W4OP) is a fascinating fellow.

2 X 2C39. The object on the bottom center is a paddle wheel that gives confirmation that the water is indeed flowing. The black meters monitor cathode currents and the center meter is plate voltage. 250W typical output.

2x2c39 Internal view showing water jackets and plumbing.

4 X 2C39 water cooled. The 2 knobs tune the input and output while the meters monitor the 4 cathode currents and plate voltage. Once again, a flow meter on the bottom center.

4 X 2C39 again, showing plumbing and the 4 cathode bias supplies.

 

[Handy Andy]

Where is the heat exchanger?

The things got to have a radiator?

:+> Andy <+:

 

[Riverman]

Am in awe when I look at Dale's other homebrew projects. Wow.

http://www.parelectronics.com/par-homebrew-projects.php

Click on the individual pics for a closer look.

Don't know when he found the time to develop his Endfedz, Omniangle, RF Rectangle and W4OP Loop antennas.

Anyone here know him personally? I hear he's a super nice guy.

 

[Dmans]

Reminds me of a "Previous Life" where I installed and repaired Generator Load Banks. Some were water cooled and handled 500KV or so. Mostly in the NE US where fresh water was pumped in from one of the rivers, cooled the unit and returned to the river. Still in awe of that concept.

I guess the Fan Noise on this Amp is bearable?

73's
David