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Post subject: Input PCB for Deluxe Reverb Reissue
Posted: Fri Sep 16, 2016 5:44 pm
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Does anyone know where I can track down the input PCB for a Deluxe Reverb Reissue (the thin one across the front that holds all of the jacks and pots)? A trace (actually a pad) that connects to a wire on one of the ribbon connectors broke. I bypassed it by hardwiring it point-to-point, so the amp is working just fine. If it's not too expensive, I'd like to get a new empty one that I can repopulate with the components off the old one (maybe upgrading the jacks...Plastic? Really?). Perhaps, down the road I'll get rid of the PCBs altogether and do a complete point-to-point overhaul, but not right now.

I'll probably need at least one new six wire ribbon connector as well.

Thanks much.


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Post subject: Re: Input PCB for Deluxe Reverb Reissue
Posted: Fri Sep 16, 2016 8:38 pm
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I've seen some of that stuff listed on Ebay, usually by sellers who are transforming a re-issue amp from PCB's to point-to-point construction.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Input PCB for Deluxe Reverb Reissue
Posted: Sat Sep 17, 2016 9:12 am
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The question I have is.... "how did that break?" were you in the amp? :o Secondly, why replace it. Chances are your re-trace is more solid than most robotic welds. I say keep it as is. If its working, & you did it right.. the weld/connection is probably better that if it was from the factory... Rock on!

Years in electronic repair in the maintenance field I view a PC Boards in the same light as a PTP/Turret boards. They all are integrated circuits to me. IMO.... Not one is harder than the other to repair. Repairing or moving traces on a PCB for me is no different than rewiring/repairing a ptp. (after delving into a few amp schematics and repairing a few amps)

I'm convinced there is a bunch of crap out there on sites like this...)

PC boards don't wear out or somehow breakdown from heat..(they do but not in our lifetime) I've never come across a PCB that was brittle to the touch (even cheap thin ones I've repaired from the late 1970's in PNC actuators)

Welds...There is problem! They break (even in turret/ptp wiring) but usually not from vibration but from oxidation. (in 99% of all electronics)

Are PCB's really hard to get at? ( took me 20 min to extrapolate a HRD PCB...(another half hour to find the problem using the TP# on the schematic another 5-10 min to fix it) People who cite working on PCBs as hard or time consuming, are they lazy? I wonder? Or are they regurgitating prior internet mumbo jumbo passing it off as there own without never really doing said actions.

Vintage amp schematics are not colour coded or have a numbering test point ledger system (to include O-scope matrix's for visuals) Every modern amp with a PCB that I know of has these.... If your vintage repair guy... and love to cite how hard it is to repair an amp with a PCB vs a vintage ptp amp then I wonder if new amp schematics with diagrams marked TP-# (test points) and the ledger citing a # vac (the correct voltage for that point) are they Egyptian hieroglyphics to you?
IMO MODERN AMP SCHEMATICS REALLY SIMPLIFY THE DIAGNOSES OF THE PROBLEM....
(if your really know what your doing & you know to use ohms math to further narrow down the problem in that TP area, your almost an expert in repairing that type of amp.. Fist time in!!)

Being clueless as to what I'm talking about or how to employ the information cited above to keep from guessing.... doesn't really make ANYONE credible in my eyes.

Some guys out there are very knowledgable having worked on amp IC's for their whole lives (say a AAA763 or a 5F6-A etc ) These guy can go right to (their time in service acquired) known test points to find out what's going on....(very experienced in trouble shooting with certain amps) Their experience makes them very familiar with and an expert in repairing these amps . Seems those people should be able to appreciate modern amps and their schematics (which pretty much synthesise a lot the expertise these people have garnered over the years and puts it on paper.... )

Just my 2 cents


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Post subject: Re: Input PCB for Deluxe Reverb Reissue
Posted: Sat Sep 17, 2016 10:16 am
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As to how it broke, I don't know. I got a great deal on the amp because the owner said that since he bought it (from the original owner) it has had an intermittent problem with the Vibrato channel cutting in and out. Five minutes of poking around with a "chopstick" revealed a bad connection between one of the wires on the middle ribbon connector (which carries the Tremolo input signal) and the PCB. After unsoldering the wire and with the help of a meter and magnifying class, it became evident that there was a crack between the pad and the trace. I've got it wired point-to-point right now. That's the story.


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Post subject: Re: Input PCB for Deluxe Reverb Reissue
Posted: Sat Sep 17, 2016 10:19 am
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Arjay - I did find an entire PCB assembly including filter caps, reverb board, etc. on eBay. I'm going try to find just that input PCB. Although, buying the entire assembly would give me a whole cache of spare parts! Tks.


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Post subject: Re: Input PCB for Deluxe Reverb Reissue
Posted: Sat Sep 17, 2016 12:54 pm
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If it's not a critical requirement, keep checking. I'm certain that I've seen the input/control panel PCB's as stand-alone listings.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Input PCB for Deluxe Reverb Reissue
Posted: Sat Sep 17, 2016 1:19 pm
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Yup, I found a guy who has one loaded with the jacks, pots, components and ribbon connectors who will sell it to me pretty cheaply. Thanks.


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Post subject: Re: Input PCB for Deluxe Reverb Reissue
Posted: Sat Sep 17, 2016 2:43 pm
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Kewl!

8)

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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