Upgrading a Hammond Organ with new Tone Generator Capacitors

Top of Tonewheel Generator inside Hammond C3 Organ

Please read the Hammond Organ Tone Generator Recap @  http://www.sl-prokeys.com/prokeys/recap.htm & Hammond B3 and Leslie Tips @ http://www.hammondb3andleslietips.com/tonegeneratorfiltercaps.htm Old Tonewheel Generator Capacitors ? Replace them ! The main reason is it'll no longer sound dull in the middle of the keyboard with sub-fund drawbars pulled all the way out. The bass sub-fund drawbar tends to drown everything out. The old wax capacitors deteriorate with age especially after 30 odd years and their value increases. Its time to bin 'em Get yourself a printout of the 'A-100 Theory of Operation Manual' from the following website link coz it helps a lot. It's the same for C3 and B3 Hammonds. A-100 Theory of Operation Manual   After desoldering all the old wax caps off they measured over three times the value of what they are meant to be and what they were originally when the generator was built. This bigger capacitance leads to a much lower cut off point for the tone, therefore lower frequencies sound louder ie, it sounds like the bass pot is turned up to full and the treble turned down. Not nice !! Replacement mylar film (polyester) type caps will be best but if you can't get hold of any mylar type caps then try some more available types. Using axial non-electrolytics which are cheap, I put six 0.22uF capacitors for  frequencies 49 to 54, and forty seven 0.1uF capacitors for frequencies 55 to 91. Axials are longer than radial caps so they'll reach the terminals on top of the  generator. Frequencies 37 to 48 got the special treatment of a 10ohm 1/2watt resistor and a 47uF tantulum bead added inline between the tone generator and manual keys. You'll have to view the Technical Bulletin here to mod these or take a lake at the Benton Electronics Website - click on Service Info then Servicing the Tone Generator then Generator Filters. Benton Electronics   With a Hammond pre-amp setting of 1 turn (hole thru expression control box in back of Hammond) you get a pretty good sound. Turn it all the way, 1 & a half turns and it sounds even better !! Dirty!!

145 / 147 LESLIE SPEAKER MOTORS HOOK UP WITH 117V UNIVERSAL SSR SOLID STATE RELAY (USSR)

Kelly 50 valve amp repaired

On stage @ Berties Banqueting Rooms, Elland

Yorkshire hills snow

I like this pic - it's a panoramic day-time snow covered shot of the Yorkshire hills in the UK.

I like this pic - it's a panoramic night-time shot of the La Place Stanislas square in Nancy France

Apologies - this is WIP
Actually you could play the track to your right!
Come back soon