Search found 9 matches

by Isittooloudoutthere
29 Dec 2018, 09:57
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

One more thing... One reason I always prefered the Univibe over the K.R. Megavibe - which I use as a replacement - was that there's no true bypass and the signal runs through the unit, no matter if chorus or vibrato are on or off. So I get identical sounds shaped by the circuit of the Univibe - and ...
by Isittooloudoutthere
29 Dec 2018, 07:59
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

Oh well, the light shield is there, just took it off before I shot the pics.
8)
by Isittooloudoutthere
28 Dec 2018, 15:46
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

Yes! It's alive again. :D :D :D With a new diode and caps. I put in 100uf caps instead of the 220uf that had been inside. The RG article said 100uf, so I guess this is ok... The 220uf weren't available today. I have 17,5VDC after the diode. Thank you again. You've been a great help. [smilie=rlp_smil...
by Isittooloudoutthere
28 Dec 2018, 07:34
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

Ok, I'll get some new caps today and diodes and put them in on the weekend. That can't be wrong, although they have no bulbs... And an old friend of mine who works for TI will visit me tomorrow and teach me some basics about signal tracing and looking out for shorts. I'll do some measurements with h...
by Isittooloudoutthere
26 Dec 2018, 19:16
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

Don't worry, although I don't understand much theory, I know how to deal with 230VAC and more. I worked a lot in my '65 JTM45 and also in other old PTP Marshalls, Fenders and a Hiwatt. Idy, I understand. It's unlikely that the diode is the only problem and there might be a short on the board. This m...
by Isittooloudoutthere
25 Dec 2018, 08:07
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

Thanks guys! It is 13.8VAC yes. I just checked the DC voltage at the cap, and: nothing... zero. So I checked DC at the diode pin towards the circuit - zero. This could be the explanation that the bulb isn't flashing too. But a diode, failing? Very rarely I think... But it obviously had been replaced...
by Isittooloudoutthere
23 Dec 2018, 15:49
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

Ok, yes, well, I'm struggling... I have 13.8V leaving the mains transformer. Now to the signal tracing. I never did that and googled to find the most simple explanation for that but it still is not 100% clear to me. So a few questions... Can I hook up the line out of a portable CD-Player as a sound ...
by Isittooloudoutthere
17 Dec 2018, 05:07
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Re: Univibe repair advice needed

Ok, thanks. The fuse is ok, the power indicator lamp is working, the light bulb isn't flashing... When I plug in the guitar, there's no signal coming out. Just a sizzle when I turn the Volume pot. I'll check it and let you know.
by Isittooloudoutthere
15 Dec 2018, 10:33
Forum: Vintage Stompbox Corner ( ... - 1975)
Topic: Univibe repair advice needed
Replies: 24
Views: 8418

Univibe repair advice needed

Hi guys, can you help me fixing my old Univibe? It worked perfectly for many years but when I plugged it in a few weeks ago, there was no sound at all. I still have a Megavibe, but I really want to have the Shin Ei back on my board now, because I dig the non-bypass sound in combination with my old M...