My other stuff...

Monday, September 27, 2010

1961 Symphonic tube amp


What a great find!  A customer bought this the other day and dropped it off for some TLC.  It's a great example of one of the many amps that were made in Canada at the time, many of which are fantastic for recording and practicing.

This particular model has a very subtle and sweet sounding tremolo, as well as clean and dirty channels plus a quieter channel.  As expected, it has a two-prong plug and 60-cycle hum, which I'll alleviate by installing a nice long three-prong cable that will ground the chassis.

Powered by the original RCA 6V6 tubes and an 8" speaker, also made in Canada.  Unfortunately this amp has fifty years of dust and nicotine buildup.  Luck for you it can only be seen and not smelled!  A long overdue thorough cleaning is coming up...

Point-to-point hand wiring has stood the test of time ~ a closer look and it appears there has never been a modification or repair needed for this little gem!


Some surface rust on the controls was easily cleaned up with a removal and light sanding.  It was a good time to clean the pots as well to ensure a smoother function.


A pleasant surprise glued to the bottom of the plywood box underneath all that retro-filth ~ the very readable wiring schematic, dated Feb 1961.


If only this grille cloth could talk!  So impregnated with dirt that it must be effecting the tone...
I soaked it in a mild solution of warm water and plain white vinegar for an hour, then sucked it all out with a wet-vac ~ turned out very well!

The speaker and cabinet are still in great shape.  Not one screw hole was stripped and everything went back together very tight.

A little toothpaste (and someone else's toothbrush!) made the original knobs look new again.