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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Mon Feb 16, 2015 5:47 pm
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shimmilou wrote:
......but maybe the new circuit was introduced because of the need for RoHS compliance.


The EU's Ministry For Ecological Propaganda, in its infinite wisdom, determined that the rare metals contained within the photo-optic coupler were potentially toxic to both flora and fauna. Which in practical terms means, if ten million trem roaches had been dumped into the North Sea, a minnow might die.

Without bureaucrats, life itself would be impossible.

:roll:

Arjay

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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Mon Feb 16, 2015 7:10 pm
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:lol:

The same folks that head the EFSMI (European Fecal Standards and Measurements Institute).

:shock:

(BTW, not a real instituition.......or is it?) :lol:

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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Mon Feb 16, 2015 10:52 pm
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shimmilou wrote:
Hi orcunaras,

I doubt that the new tremolo circuit is causing any noise, odds are that it is a tube causing the noise. A "technician" should be able to figure out the circuit if you feel the need to change it back to the original. The original circuit was infamous for the "trem-tick" noise, but maybe the new circuit was introduced because of the need for RoHS compliance.


Unfortunatelly new circuiet causes popping according to intensity and speed knob.

Are Eu and Us Type PCB same? If these are same, pulling new tremolo circuit out and replacing the opto to original place on PCB are right for changing to analog circuit?

Thanks :)


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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Mon Feb 16, 2015 10:59 pm
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And you determined that the board was at fault, how?

If the board is faulty, fine, but I would want to do some troubleshooting first. :idea:

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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Mon Feb 16, 2015 11:09 pm
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Oh great, I'm looking forward it :)


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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Tue Feb 17, 2015 6:09 am
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Have you replaced V5 with a known good tube?

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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Tue Feb 17, 2015 6:28 am
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Like GrooveTubes? Not yet change with a different tube, i'll ask to my technician for a brand new tube.

But changing original opto-trem circuit seems very good when compared to digital circuit.


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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Tue Feb 17, 2015 6:46 am
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Solid state circuitry does not necessarily mean digital. I doubt if the new circuit board is digital. The oscillation for the tremolo is still done by the tube, V5, and the new circuit board simply replaces the original opto-isolator with solid state circuitry, which does the same thing, providing isolation for the tube (V5) that"wiggles" the guitar signal.

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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Mon Feb 06, 2017 1:29 pm
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Dear forum members.
Sorry to reanimate the thread but I recently bought a Fender 68 CDR online and, well... ran into an issue.

The vibrato makes very loud and constant hissing/ whooping/ chopper/ helicopter noises, also when not playing. It starts with plugged footswitch and effect engaged. Obviously a noise that goes with the vibrato. It starts about intensity 3 when there is almost no vibrato but the hiss is already more present than vibrato and gets faster with the rate as well. At intensity 10 it makes very loud and percussive fft... fft... fft... it's always there also with guitar volume turned down.

Of course the first thing was to complain at the shop but the tech there said that it was normal and "related to the circuit with the Opto Coupler". He also said that he had another model with the same issue and that I just should not crank intensity.

After reading about the octocoupler "surgery" in European models I opened up my amp and indeed, the OP1 was removed here too.

Now I have 3 questions:

1. is the digital -or whatever additional tremolo circuit the reason for the chopper noise and could it be fixed with removing that circuit and put back the OP1 ?

2. If yes or anyway, would it be easy to pull the PCBs and put back the OC1 where it belongs? I mean, is that the whole story: pull crap out - put opto coupler in -nothing more nothing less?
(Btw I have good soldering skills but no clue about amp circuits - I already built several stomp boxes out of kits)

3. is there another obvious reason for the noise described above? Tubes? Defective or loose parts?

Thanks for any helpful answer!


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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Thu Jul 13, 2017 7:48 am
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***solved!***

took out the solid state tremolo and put an OP1 where it belongs to. Tremolo now works as it should.


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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Thu Jul 13, 2017 7:55 am
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Moulinmatias wrote:
***solved!***

took out the solid state tremolo and put an OP1 where it belongs to. Tremolo now works as it should.


Naughty, naughty, naughty......

You can expect a visit from the EU's tremolo police real soon.

They'll arrive via black helicopters clad in body armor and packing MP5's.

:mrgreen:

Arjay

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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Thu Jul 13, 2017 6:26 pm
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"Chopper noise."

This sounds like classic interstage coupling (AKA: motorboating). Fender must not have isolated that tremolo board, very well from the rest of the gain stages. Having modded the tremolo back to the opto-bug eliminated the coupling.

:mrgreen: :thumbsup:


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Post subject: Re: 65´Deluxe Reverb Reissue vibrato
Posted: Wed Dec 27, 2017 10:03 pm
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I realize this is an older thread but am looking for additional info/help!!

Am planning to replace my grandson's 2001 DRRI circuit boards that have burned components(don't ask!!!) with recent "pulled" DRRI boards purchased from Alessandro. The original board had the OPI "roach" but the new onw apparently had the new style chip board initially mentioned in this thread. The new board does not have the chip board and I can't find that part anywhere. So.....my question is can the old style "roach" style OPI simply be installed on the new board in the 4 lead holes on the circuit board? If so, what, if anything has to be done with the old solder connection wires/points that were used for the newer style chip board? Thanks very much for any help/insight regarding this!!


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