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
Power cord the wrong way
Custom paint job ZOOM MS-70CDR
Laney Klipp100 effects loop
Since the channel mod was made on the amp it saved a half 12AX7 preamp valve. Decided to use it as gain recovery stage and add an effects loop to the amp.
/Krister
Laney Klipp100 channel mod.
Adding some optocouplers and making the klipp and the normal input selectable. Using either the switch on the front panel or remotable with a foot switch,
The front panel of the amp with the new hardware added. switching with the remote input.
/Krister
Custom paint job ZOOM MS-70CDR
Got a ZOOM Multispomp MS-70CDR on the workbench for a custom paint job.
Opening it up we see that it consists of six circuit boards. One for each set of 6,3mm jacks, two for the for the switches and one for the pots .
The motherboard holding the ZFX-3 DSP.
Everything removed but the display and the mechanical parts for the switches.
Finally the chassie with everything removed.
/Krister
Laney Klipp 100 service
I’ve starteed working on the Laney amp as mentioned in an earlier post found here. I had it recapped and with no tubes, slowly brought it up to main voltage. Here’s a picure of them new caps.
Here’s the preamp section.
As it has fixed bias but not adjustable I added a bias pot and measure points accessible from the outside on the back of the amp as seen closer in this image. I’ve also installed new 1K screen resistors instead of the 470R :s.
Here’s the back panel with the bias pot and the measure points.
Time to power it up with tubes, I had the bias voltage set to -54VDC as in it’s original state. Checked with dummy load and scope and all voltages are in specs. Also changed a few resistors and the master volume pot installed before I recieved it.
Now I just hope it plays as it should, well see.
/Krister
Caps and stuff.
Recieved some parts for the Laney Klipp100 restoration.
/Krister
Bull
Here’s the first prototype of the zeta sound BULL. With red indicating led and red knobs.
The circuit board
/Krister
Laney Klipp 100
An old Laney amp that needs som tendering.
Blows the main fuse. Tinkered with as it has a master volume pot installed and traces of other activites.
Components close up.
Checked the power transformer and it seems to be functional. I’ll start with recapping them old electrolytes.
/Krister
On the workbench
Nothing like the smell of a newly painted stompbox. I’m thinking red knobs on this one.
/Krister