Recent content by Chivvyp

Hi, Clock crystal is on the PCB under the tray, not on the main board. Pete

Hi Martin, the flea's running on a seperate tx so it's powered up before the player is switched on. The flea itself seems to be fine and I can trace the clock output to the crin pin on the 7345. Unfortunately I can't check that the oscillator is ok. Pete

Yes, put it in two working cd48s now and both cases disc refuses to spin even on start up, no toc and I just get error. Diagnosis gives radial error maybe the oscillator is faulty.

Thanks, getting about 7mv across those resistors so the flea seems to be ok. Pete

Seem to have solved it now. Went over most of the solder joints with a hot iron and the voltages now seem ok. Odd thing though, I still see higher voltages momentarily (same level as before) when I touch the probe but then it settles down to proper voltage readings. Maybe a poor earth...

Hi, Hope someone can help. Just built 2 fleas, one with the "extra power" option and it's working fine. The other which is standard to drive a tent xo is giving me 11.9 volts and I can't see where it's wrong. On the 7812 I'm getting I = 17.6, G = 1.9, O = 13.8. On the opamp 2=3.8...

Thanks again!

Thanks Martin, I think I'll be under 50ma, it's just some parts of the 5v circuit in a cd player. In case I'm not would you be able to spec the settings for a higher current? Regards Pete

Hi, I'm coming to this late but I'm going to be building some 317 based regs this weekend and thought I may as well add the vbe/gyrator to them. I'm a bit confused though, is the vbe/gyrator just the bc547, 10kr and 3.3uf combination or is the following 10/22uf from input to gnd also part...