Try rebuilding some used EICO monoblocks

Posted by Salectric (A) on December 4, 2004 at 14:07:48

In Reply to: Why scratch build what you can buy used? posted by Russ57 on December 4, 2004 at 09:08:23:

Unlike the Dynaco amps, the EICO amps, mono and stereo, are hard-wired---no printed circuit boards to get old and unreliable. The monoblocks in particular have lots of room underneath to hold all sorts of variations for future experiments. What I would do if I were you is to buy a pair of EICO monoblocks on Ebay such as the HF-22 or HF-35, first get them working correctly by repairing/restoring the original circuit, in other words replacing old capacitors, etc. Then after you're familiar with the amps, you can play around with different coupling caps, different resistors, different power supply caps, etc. Then when you're really ready for DIY, you can strip each amp, removing all of the components including transformers and tube sockets, throw everything away except the transformers and chassis, and then rebuild each amp with all new parts. This way you have a totally homebuilt amp, but you're working with a tried and true design on a chassis that is already punched with holes for all the tube sockets. And to top if off, the EICO output transformers are some of the best ever made. For more information on the EICO models, check out the following site:

http://users.rcn.com/fiddler.interport/EICO.HTM

One last thing: try to buy kit built amps instead of factory wired units. The reason is that many of the factory wired amps use rivets instead of bolts and nuts to secure the tube sockets and terminal strips, and removing them is much more difficult than with a kit.

Dave

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Follow Ups Full Thread

Topic - Starting a DIY project... - 7591 06:40:29 12/4/04 (15)

Consider Plitron / Vanderveen Trannies - Dr Deville 18:20:20 12/4/04 (0)

well - Sector-7G 15:41:25 12/4/04 (2)

Agreed 100% - SomeJoe 19:06:09 12/4/04 (1)

Agreed 100% - Sector-7G 05:15:10 12/5/04 (0)

Why scratch build what you can buy used? - Russ57 09:08:23 12/4/04 (3)

Try rebuilding some used EICO monoblocks - Salectric 12/4/0414:07:48 12/4/04 (2)

You're certainly welcome. Good luck! (nt) - Salectric 15:48:34 12/4/04 (0)

Re: Try rebuilding some used EICO monoblocks - 7591 15:03:12 12/4/04 (0)

Look at Herbert Keroes original circuits. - grhughes 07:23:16 12/4/04 (3)

Re: Look at Herbert Keroes original circuits. - Henry Pasternack 08:00:59 12/4/04 (2)

Re: Look at Herbert Keroes original circuits. - 7591 14:50:25 12/4/04 (1)

Re: Look at Herbert Keroes original circuits. - Henry Pasternack 15:18:38 12/4/04 (0)

forgot to add... - 7591 07:12:49 12/4/04 (2)

One 5AR4 is full wave - Russ57 09:23:51 12/4/04 (0)

Look at the Marantz Model 2 amp - grhughes 07:32:38 12/4/04 (0)

Follow Ups

Try rebuilding some used EICO monoblocks - Salectric 12/4/0414:07:48 12/4/04 (2)

You're certainly welcome. Good luck! (nt) - Salectric 15:48:34 12/4/04 (0)

Re: Try rebuilding some used EICO monoblocks - 7591 15:03:12 12/4/04 (0)

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