Square pads *are* the emitters for Q4 & Q5 on these boards, so that's right. Hm. Have you checked all the resistor values? The other way I would tackle this would be to start at the control voltages and work through things. Measure to see that the linear detune is at 0V. Don't have anything plugged ...

The transistor situation is very confusing on these boards. If you're using the BCMs on the bottom side, you're not using Q8 then, correct? I believe that QSSM and QM are also to be skipped if you're using through hole Q4 & Q5, and skip Q9 if you're using through hole for Q7. I would imagine having ...

I’m actually thinking of creating new panels in black to see how they come out, but that’ll probably happen years down the line ;-) One thing I did wonder - one of the appeals of making a new panel is that I’d incorporate the LED holes upfront. What I can’t figure out, though - the 73-75 mods I’ve ...

Schematics are posted all over; just run a google search for “lexicon vortex service manual.” Someone else here on Muff’s has an encoder repair kit for sale, but I forget their user name. That would be me, but obviously I haven't been paying a lot of attention. PM me and we can discuss the details;...

Actually no I haven't. The Vortex stuff has been sidetracked for a while.....

Fitchie wrote: ↑

Fri Oct 02, 2020 4:39 pm

elmegil wrote: ↑

Fri Oct 02, 2020 4:26 pm

I suspect it may be something about permissions somewhere along the way?

Original message edited.
Can you see the pictures now?

yes, thank you!

@Fitchie, those images don't appear to be working right now? Mmm... Strange... I can see them clearly. Try these links: http://www.vocoder.eu/docs/FilterPrinciple.jpg http://www.vocoder.eu/docs/Envelope.jpg I suspect it may be something about permissions somewhere along the way? The links do work f...

@Fitchie, those images don't appear to be working right now?

Bamboombaps wrote: ↑

Thu Oct 01, 2020 12:05 pm

yea sure i could use a nice rings panel. dont suppose you have a veils one of any description?

No I don't. I'll send PM for details

Thanks

I have 3 extras of a 14HP Rings panel with the Lord of the Rings ring inscription under the solder mask, as well as the tree of westron. Not my design, but someone kindly shared their gerbers with me on condition of only using for trades or gifts. I would like to trade one for the topographic person...

- Troubleshoot some clock issues - it tends to run very fast when switched on and the minimum speed stays quite fast. It does accept external clocking though. I will try my hand at this with the service manual and a scope. There's a frequency calibration step in the service manual, the very first p...

Soundbrigade wrote: ↑

Sun Sep 20, 2020 4:20 am

The MFOS 2x16/1x32 step sequenzer (maybe add quantizers).

sequenzer.jpg

WOWOW

KSS wrote: ↑

Fri Sep 18, 2020 12:13 pm

Fair enough. Thanks for the feedback.

No potshot intended. If I didn't respect Kiplings work and efforts I wouldn't be in this thread at all.

Fair enough back at you I apologize for seeing things that weren't intended.

While I don't subscribe to 'fixing' and troubleshooting by the scattershot chip replacement suggested above I don't see any scattershot replacement suggested though. Kipling suggested removing the chips to make measurements. Chips selected specifically because they are in the vicinity of the proble...

Are the other q outputs off z25 ok? Probably if the stairstep is good.... Any chance that pin is shorted to ground?

BTW have you walked through the service manual test points? It would be helpful to know what each of the test points 11 through 21 look like.

i'm still struggling with those issues. the only fault i can find is that I have no output on TP17, which should be one of the counters (Q5) from the Z25 CD4024. When I scope this it looks like Q4 lines up with the reset cycle so it makes sense that Q5 would never trigger. Does this mean I have iss...

oscarthesquirrel wrote: ↑

Sun Aug 30, 2020 10:27 pm

Tada...V6a board and a few trimmer twists later I'm a happy boy...

Gates 1,2,3 Pos 1, Clocked gate out and Clock out all doing what they do best...

Thanks to everyone for their prompt and courteous guidance.

Steve

I'm glad you were able to sort it

Hi..quick question about the new 1601 clone I've just received (fully built) from Synthcube. For some reason, the clock out voltage appears to be approx 6.4V and won't drive my ARP2600 (which needs +10v or higher)...I'd assumed that a 1601 clone would pump out enough volts to drive the thing it was...

Agreed. I actually discussed that possibility with someone who has more experience than I with manufacturing parts, and as far as I know that's never gone anywhere. There is a Fender encoder part that looks identical, definitely the same manufacturer, but I haven't confirmed whether the operation is...

Yes, but for whatever reason lexicon chose to make these inverted from the standard.

I have no idea why Muff's never updated me with these replies. Yes I have a working update. IMG_3127.JPG IMG_3126.JPG More details here: https://docs.google.com/document/d/1i9mYZ4Ezl6ja4aGsn7jYUz4SJLDFa8M8D7FBVsL6auo/edit?usp=sharing I will sell blank PCBs for $10 apiece and you get the rest of the ...

Not here, sorry :(

Check resistor values in the vicinity, and the value of your timing cap.

Also if you have any flux on the board (even no-clean) around the timing cap, clean it up.

Right the HF trim is only going to "correct" for it being flat at high frequencies, because it makes the signal more sharp. Are you sure you're starting with the HF trim at its minimum? Just turn the HF trim in the direction that drops the frequency until it stops dropping/you hear the trimmer click...