Received a shipment with parts for a Marshall 2205. Thumbs up for Tube-Town, they sent chocalate with the package!
/Krister
Work in progress
Received a shipment with parts for a Marshall 2205. Thumbs up for Tube-Town, they sent chocalate with the package!
/Krister
The channel switching mod to the old Siemens 6 S Ela 2427c installed. The optocouplers circuit board found a place.
Another view, on the left is the input jack, switch for channels and a remote jack for channels.
I removed the guts from the pilot lamp and installed the channel indicating leds in it. We can see the two new pots installed, a clean volume pot and a mids pot.
Another view where you can see the new wiring to the old pilot lamp now acting as channel indicator.
/Krister
Laney Klipp100 amplifier after modification. The master volume pot was a mod already made. It now holds a switch for channel selection, a 6,3mm jack for remote channel switching and indicating leds for each channel.
Back of the amplifier. Bias pot, bias measuring points , effects loop with send level pot and a gain switch.
Here’s an image with the channel switching circuit board installed using optocouplers .
A closer look at the gain switch mod and the effects loop.
Here’s an image of the bias pot with measuring outlets and the transformer for the channel switching circuit,
/Krister
This is what’s to be the V2 of the PS-1A clone. It’s got a new main circuit board with onboard in/output jacks.
Here’s the circuit installed in the chassie.
/Krister
Here’s a Zachry D250 solid state amplifier. It stopped working producing only a 100Hz noise. Look at them blue filter caps, seems a bit swollen.
Here’s a picture from the bottom of the caps.
Those caps are out of date. Had a hard time finding 15000uF 63V caps with a diameter of 35mm. Finaly found and ordered F&T :s with the right values but a diameter of 40mm. I should be able to fit hem.
/Krister
Addon circuit board for channel switching with optocouplers.
/Krister
A new channel switching circuit board prepared for an old tube amp.
The plan is to fit it in this one.
/Krister
Giving the zeta sound Turtle Clipper an updated circuit board.
/Krister
A word of warning. Never install your power cord like this!
Found it when replacing a bad power cord in an old amp. Had the new cord installed properly with the ground wire directly to the chassie ground.
/Krister
The ZOOM pedal in a new colour and hardware mounted. Previous post.
/Krister