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Howard 256 restoration
#1

The Howard 256 restoration has begun. The schematic can be found at THIS LINK. Its the version with 2 to 6.5 mcycles shortwave band seen on page 8-10 at the top.
[Image: https://www.dropbox.com/s/sos00d52xk49ph....JPG?raw=1]
[Image: https://www.dropbox.com/s/wnacr0g2ktcxcl....JPG?raw=1]
[Image: https://www.dropbox.com/s/5bykhtxi3dwrk1....JPG?raw=1]
[Image: https://www.dropbox.com/s/wp9xvbjk3fkm8c....JPG?raw=1]

The original dual 8/4 mF electrolytic had been clipped off and a set of Mallory 8mF caps had been placed under the chassis. Fortunately they left the original cardboard can in the set and I was able to soften the tar and get the guts out with a combination of heat gun, box cutter blade, screw driver, a long screw into the cap and pulling with pliers and swearing. The new caps are inplace and ready to be wired in.

[Image: https://www.dropbox.com/s/cumzt0z4uwy832....JPG?raw=1]
[Image: https://www.dropbox.com/s/yt1yr4illvdlac....JPG?raw=1]
[Image: https://www.dropbox.com/s/3p2oqe2omypub5....JPG?raw=1]

This one is going to have some interesting work around the dial. Its a construction I have not seen before, but that's for later. Do the easy part first... Icon_lol I won't be cleaning up the chassis to look shiny new but there was a lot of dirt, dust and some rust that will come off. So far I think all the coils and transformers are intact. The band switch has something wrong with it. There are only two bands but the switch rotates more than two stops so I think there may be some damage there. Looks like someone did some soldering onto the shaft near the body of the switch. At least is still rotates. More later.


Messages In This Thread
Howard 256 restoration - by klondike98 - 05-10-2023, 01:14 PM
RE: Howard 256 restoration - by radiorich - 05-10-2023, 07:33 PM
RE: Howard 256 restoration - by radiorich - 05-10-2023, 07:35 PM
RE: Howard 256 restoration - by klondike98 - 05-10-2023, 09:08 PM
RE: Howard 256 restoration - by radiorich - 05-10-2023, 10:07 PM
RE: Howard 256 restoration - by klondike98 - 05-12-2023, 08:39 PM
RE: Howard 256 restoration - by klondike98 - 05-22-2023, 07:24 PM
RE: Howard 256 restoration - by GarySP - 05-22-2023, 08:20 PM
RE: Howard 256 restoration - by DaleHCook - 05-22-2023, 09:27 PM
RE: Howard 256 restoration - by klondike98 - 05-22-2023, 09:57 PM
RE: Howard 256 restoration - by klondike98 - 06-12-2023, 07:38 PM
RE: Howard 256 restoration - by radiorich - 06-12-2023, 08:56 PM
RE: Howard 256 restoration - by radiorich - 06-12-2023, 08:59 PM
RE: Howard 256 restoration - by Paul Philco322 - 06-12-2023, 09:41 PM
462ron - by 462ron - 06-13-2023, 08:40 AM
RE: Howard 256 restoration - by morzh - 06-13-2023, 10:47 AM
RE: Howard 256 restoration - by klondike98 - 06-13-2023, 06:18 PM
RE: Howard 256 restoration - by GarySP - 06-14-2023, 08:55 PM



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