Posts by Wirehead (archived2)
11 total posts10 results
Transistors painted at the top
in Imported Content (Unmapped) · Jun 9, 2016 20:53I've noticed the same while repairing a Beomaster 4400 (see thread on the forum). If the part is marked with an asterisk (*) in the schematic, it's a "specially selected part". In my case, I noticed this at the long tail…
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · May 30, 2016 06:17I guess the unit didn't belong to a smoker (almost squeaky clean inside, except for some dust) and it probably didn't sit in the sun :) Would be awesome if Martin made these indeed, as they are a bit fragile and really m…
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · May 12, 2016 22:42Just a further heads-up. I decided to replace 5TR112/113 and 5TR212/213 (Both input differential pairs) to lower the DC Offset even further. I used my curve tracer to match 2 pairs of BC546B. I noticed that B&O marks the…
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · Apr 16, 2016 10:49Much better 🤒
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · Mar 24, 2016 15:24You don't say? 😕 I recently ordered one on ebay from.. well... you 😁 haha
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · Mar 24, 2016 14:38Sorry admin - had no intention of s****** here :) just wanted to post the info in case someone runs into the same issue! Here's the Beomaster 4400, after respraying the switches and a full teardown and service :) 👍
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · Mar 15, 2016 17:48Yes, they are pretty good. Did extensive work on this one, as it's optically in mint condition. Recapped where needed with Panasonic EB series (105°C - 10 000 hours) / Philips. Gone are the leaky Roederstein caps. Replac…
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · Mar 15, 2016 11:29Well, it was 1TR2 all along. Measured high as I was thinking in the first place. Replaced it with a fresh (NOS) Siemens BF255. Great reception!
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · Mar 9, 2016 23:21I suspect the TIS88A's (1TR3 and 1TR4). Getting 14.3 volt at the drain of TR3; 4V at the source; but only 0,4V at the source of TR4; instead of 0,7 in the schematics. Anyone can chime in on these? Do they frequently fail…
Beomaster 4400 - bringing it back to life
in Imported Content (Unmapped) · Mar 9, 2016 18:19Hi all, New to the forum, looks great! I have a mint looking Beomaster 4400 that I'm slowly bringing back to life. The previous owner had hacked in another DIN cable (probably to connect it to an external equaliser). In …