09-08-2025, 09:04 AM
Not sure when I'll have to time to look at properly but I opened it up this morning. Most of the caps are ceramic, including the ones to the output valves, so that gives the valves and transformers a good chance. One black horror in what looks like a non-critical position. Two "red and black" 50uF electrolytics as cathode decouplers. To be changed on sight. Looks like the original rectifier has been replaced, very neatly, by a silicon diode and a Radiospares 39R WW resistor.
There's a fuse that looks like and MES lamp. I've never seen one before. Slightly surprised to see half-wave rectification in a slightly up-market product. I noticed that the SRP30 (on the same page in R&TVS) used an EZ80 with both halves in parallel to do halfwave. Buch must also have had a surplus of EBC81s as they used the triode section of that in the SRP30, with the diode anodes grounded.
There's a fuse that looks like and MES lamp. I've never seen one before. Slightly surprised to see half-wave rectification in a slightly up-market product. I noticed that the SRP30 (on the same page in R&TVS) used an EZ80 with both halves in parallel to do halfwave. Buch must also have had a surplus of EBC81s as they used the triode section of that in the SRP30, with the diode anodes grounded.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
