The Master 39K came in two different chassis versions. They are very similar with only a few components difference, mainly related to the fitting of a new output valve, CL6 instead of CL4. This set has the "late" chassis with a CL6 and other components corresponding to what is referred to in the service manual as "Version II". Martin

Several valves in this set has a label near their socket, telling in handwriting when (and by who) the valve was replaced. Dates in 1956 and 1958 match the stickers at the back. You don't find repairshops leaving info for the next repairer like this anymore. Martin

One more service sticker is found, taped to the IF can. Well, the tape seems to be holding on merely out of old habit but it did its job nicely for 50 years and the sticker is preserved. It's again from the same repairshop and dated 18/8-1958 That's 52 years ago and I feel tempted to add a similar sticker of my own when done, simply to add my

Sockets are found in many other sets, even cheaper ones, but here the leads are just soldered to the output transformer. As mentioned earlier, this set does does not correspond to the service manual but bears no traces of being modified so it may have been produced like this. Well, that is, the socket is on the chassis, but it is not connected and of

Nice photo again. Yes, there's exactly room for it right below decks under the plug/socket. No need to dismount any further, I'm sure it's down there. But thanks anyways, greatly appreciated ! Martin

I agree. It looks more like the Beolit 39 lamp. Martin

With the back off, I can see where the "Telefon" socket connects. It sits directly across the speaker, soldered to the output transformer, which is of B&O's own production, fitted to the bottom of the cabinet right behind the speaker. As mentioned above, this output transformer does not correspond to the service manual, that suggests

Rudy, Thanks for this nice photo of your set. Looks like you already found an alternative for the dial lamp ... Seriously, these have proved incredibly hard to find and probably easier to replace by something else. It seems to be a 110V lamp and the current is the same as that of the valve heaters. I made a temporary solution in a Beolit 39 for the

Thanks Jaff, Nice to know that there are people following this thread. Rudy, that's interesting. I'm working on chassis no. 41548 and it has the new circuitry and a CL6. Of course, we cannot rule out that one of them was modified at some point but I doubt that it could be the one, I have here. It shows absolutely no signs of modifications of

Thanks Vifa, for the interest and comment. So that is the explanation. It makes perfect sense here in that this set was in use only 25 Km or so from Copenhagen. Martin