Rob, Thanks very much for the info on the feedback cct,on the main amp, & also regarding the tone correction in the control unit. I must admit I was thinking of modifying the tone correction anyway, as I found before that some Jukeboxes used in home surroundings (i.e. with small rooms) do need s...

Hi, I don't know the particular Rock-Ola circuit, but there are several ways you could provide a line-level aux input. Because I'm an electronics engineer, I would probably l just add an internal attenuator pad, which would cost a few cents. However, I realize that you probably don't want to go poki...

Hello, I recognize the Magnavox, they appeared over here in the U.K. They used to appear at our annual Audio Fair in London. "Superimpose" was a term used by many manufacturers here, regardless of make. When in this mode, the oscillator bias is removed from the erase head, but of course st...

Thanks Alan, The manufacturer's ref. number on the Tx is L-2729. The only spec I have, is that which is shown on the original Ami manual, not a lot! Obviously it needs to match the anode (plate!) load spec of the 6973. Alternatively I suppose one could do what was done in the U.K. & use EL84's. ...

Thanks Rob, I appreciate the extra information. Interestingly, the Rowe versions had amplifiers of U.K. origin, but this Continental 2 is an all U.S. made unit. Having checked the internet for a likely replacement transformer, I will probably not go for a 'used' one. I note that Hammond in the U.S. ...

Looks like I've solved the problem although not yet fixed it. Using an audio generator, & sorting out which lead was which, produced confusing results. I'd already noticed the asymmetric clipping, which was occurring at quite low output level, so I carried out a couple of checks; One measuring t...

Hi Rob, Thanks so much for your reply, I will look at the link that you sent right now. I used a similar method to you for sorting out the secondary taps, but the results were inconclusive. Because the schematic doesn't show, for example which is the 70v line tap, or where exactly the NFB is in rela...

Hello, I'm new to the forum, so please excuse me if I don't get all the procedures correct! I'm repairing an extremely "got-at" Continental 2 for a friend. To give you some idea how bad it was... The amplifier chassis had been completely stripped, chassis painted (including where the earth...