Selmer Treble N Bass 100 Tremolo Recap and Service

Interesting Treble and Bass 100 Watt with Trem in a Metal Shell!Interesting Treble and Bass 100 Watt with Trem in a Metal Shell!Inputs over the controls... leads haningin front.. not sensible..Inputs over the controls… leads haningin front.. not sensible..DSC_1923DSC_1924DSC_1926DSC_1927Scokets for 4xEL34Scokets for 4xEL34Nice big choke but output transformer a little small for 100 Watts me thinks...Nice big choke but output transformer a little small for 100 Watts me thinks…Massive cap is only 32uF 500 V and too too old...Massive cap is only 32uF 500 V and too too old…DSC_1931Output transformerOutput transformerFairly neat inside.. Good Earth Bus.. which someone has added too (probably to reduce hum in the output stage. Now all referenced to one point on the chassis nice..Fairly neat inside.. Good Earth Bus.. which someone has added too (probably to reduce hum in the output stage. Now all referenced to one point on the chassis nice..DSC_1933Preamp uses inductors in the filtering.. nice but expensive.Preamp uses inductors in the filtering.. nice but expensive.Supply caps spread out a bit...Supply caps spread out a bit…2 screen resistors look a little fried but test good. Other two have been replaced2 screen resistors look a little fried but test good. Other two have been replacedOptical tremolo components floating around a bit..Optical tremolo components floating around a bit..Supply wire has perished and gone all sticky...Supply wire has perished and gone all sticky…OK new supply caps in place. I  used a spare hole for the new HT cap and upped it to 50uF either side of the chokeOK new supply caps in place. I used a spare hole for the new HT cap and upped it to 50uF either side of the chokeEmpty big vent holes where the original cap was... added a short tag strip for the two rectifier diodes (could have put a bridge in but these do the job)Empty big vent holes where the original cap was… added a short tag strip for the two rectifier diodes (could have put a bridge in but these do the job)Caps viewed from the top next to the massive chioke!Caps viewed from the top next to the massive chioke!Sticky power lead replaced...Sticky power lead replaced…New gromets on the power supply wireNew gromets on the power supply wireKettle lead adapter on the end of the mains leadKettle lead adapter on the end of the mains leadBech testing and bias setup. Bias too hot needed the circuit moding and took a while to get the bass channel going!Bech testing and bias setup. Bias too hot needed the circuit moding and took a while to get the bass channel going!Variable bias pot installed and hot glue used to hold the neon/photo resistor to make them more stable, great sounding trem!Variable bias pot installed and hot glue used to hold the neon/photo resistor to make them more stable, great sounding trem!All done. Bass channel rich the normall is very bright.. One of the coupling caps is only 500pF so not much bass getting through by design..  If I was using her un modded I would jump the two channelsAll done. Bass channel rich the normall is very bright.. One of the coupling caps is only 500pF so not much bass getting through by design.. If I was using her un modded I would jump the two channelsMetal case back onMetal case back onAll good to go back to the customer!All good to go back to the customer!

Leave a Reply

Your email address will not be published. Required fields are marked *

* Copy This Password *

* Type Or Paste Password Here *