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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Wed Oct 05, 2016 4:04 pm
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jackhammer wrote:
The caps are probably Vishay/Sprague Orange drop type. Great caps, but Fender doesn’t use them, why should you.


Fender doesn't use those caps because by specifying marginal IC components of less-than-stellar quality, they save enough on each amp they build to buy Bono a new pair of designer sunglasses each week.

:lol:

Arjay

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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Wed Oct 05, 2016 5:37 pm
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This makes no sense to any electrical engineer or someone like me who's been in the electrical repair world for 15 yrs.

Rewiring a perfectly fine DRRI to a point to point is a waste of time. The performance of said amp isn't going to warrant the effort. With all amps it's the tone stack that makes all the difference! Tearing apart an amp to build the exact same TONE STACK!! What the FRACK???

and the $$$ spent on quality components moves the needle on the "improve tone" gauge very marginally.. you really have to spend some serious $$$ to move the gauge where you actually hear a difference.

Unless your going for a Tube rectifier feel (using an old schematic that takes a tube rectifier.... Oh WAIT ... new DRRI's have a Tube rectifiers LOL!!!! )

You have just reduced the over all efficiency and performance of that amp. Very few amp hobbyists understand linear electronics and what a PCB brings to that table,, but here I'll give some a major FYI's A) your best PTP wiring job will still pale in comparison to that PCB you just threw out.. the resistance that a standard PCB has due to modern manufacturing (computer cad designed) is extremely efficient! Unless your have a computer guided robot to do your welds & measure optimum distances of wire for the best current resistance your PTP job will never be as good as the PCB you just pitched!

There is so much crud on the internet and so many posers on sites like this... if you wanted to improve the performance in tone with this amp, about a $100 in components in a few key areas would have been more than enough...CAUTION A tone stack is a tone stack..... your not going to change it/improve it that much from its original starting point. (Even hand wiring it... the tone stack is STILL THE SAME TONE STACK!
I wish people would understand If you know what your doing PCB is no different than PTP/Turret IC's.

People who say different don't know what they are doing! And I'll stand by that statement all day!

PCB, PTP & Turret ....they are all integrated circuits! The schematics are the same! Then factor in... PCB amps with modern schematics that are colour coded and with key test points and the values given, to include wave signatures for O-scope diagnosing... tearing apart a perfectly good amp because its of PCB design... ??? Really?

If your doing this for a conversation piece or to gain experience in amp maintenance/repair then this is a cool project!

Thinking your end result is going to be a vast improvement over that PCB IC of that DRRI???? If so, your going to be disappointed and then spend a lot of time convincing yourself that what you did was warranted. You won't be able to use the quality of sound/tone... especially not being satisfied after you have exhausted all the minor modification your going to do after you get it up and running... And if you think the 'Maintenance factor" is going to warrant gutting that amp? Really? Again... If you know what your doing a PCB design is just as easy to repair (if anything way easier schematics for diagnosing the problem) and their is no supportive argument that PCB designed amps like the Fender DRRI will not hold up. (or don't hold up to repairs...)


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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Wed Oct 12, 2016 5:45 pm
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SkipBurz,

Found this, while checking out BF DR's on the Net, for a friend. MAN! Have $$$ for the blackface amps gone through the roof or what? $3-5K for "good" ones.

http://www.ebay.com/itm/Fender-65-Delux ... SwNSxVKvor


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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Wed Oct 12, 2016 6:50 pm
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The high prices for quality vintage amps helps keep them out of the hands of neanderthals and morons who have no respect for such valuable artifacts and would carelessly trash them or decide they knew more than Leo and try to "improve" them by modding.

Quality costs.

Arjay

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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Wed Oct 12, 2016 7:53 pm
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$4400 BIN? Crazy! :lol:

http://www.ebay.com/itm/Fender-Deluxe-R ... Sw8w1X4zvh


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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 11:05 am
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When a reverb unit alone goes for $4700, that's a bargain.

But seriously, asking price is not selling price.


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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 11:19 am
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Yabbut, the condition of that amp is terrible. Anyhow, the seller being in Japan, says a lot. They are crazy about vintage US made products (who isn't). And I'm sure buying a used amp, then shipping and insuring it --- from US to Japan is prolly 25% or more of the cost. Then, waiting 30 days for the darn thing to arrive. So, having the seller in Japan means a lot less hassles for Japanese buyer.

I have made some successful overseas purchases. A pair of JBL D120F and one D130F from Australia (mint condition). And an octet!!! of matched Tungsol 6550 from Singapore. The Singapore one was done by a guy, whose amp I help fix. There is this great tube seller in the Ukraine. Got a whole bunch of K40Y-9 caps and 6pi14-EV (EL84M) from him. But, I digress...

:lol:


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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 11:36 am
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arth1 wrote:
But seriously, asking price is not selling price.


Correct.

A more accurate measure of the secondary market for vintage gear is EBay's compilation of completed sales which is conveniently provided.

Arjay

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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 12:01 pm
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Reverb also has a price guide based on completed sales.

For a 1965 Deluxe Reverb, the going price is $1900-$2400, while a used newer DRRI goes for $640-$740.


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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 12:24 pm
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Those prices seem consistent with the overall market though bargains are still to be had for those who diligently search.

Arjay

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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 5:02 pm
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Retroverbial wrote:
Those prices seem consistent with the overall market though bargains are still to be had for those who diligently search.

You can save quite a bit of money if you're handy enough with tools to change the grille cloth, and for most popular amps, the correct cloth is available. Yes, it won't be "authentic" with a new grill cloth, but it won't be authentic with new tubes or a replacement power cable either... But an ugly grille cloth can easily mean $300 less, and it takes $20-30 to fix.


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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 5:53 pm
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I'm the undisputed "king of frugality" here.

:mrgreen:

Arjay

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Post subject: Re: Rewiring a DRRI Point-to-Point
Posted: Thu Oct 13, 2016 9:37 pm
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The torn "toe Rex" is a deal breaker for me. :mrgreen:

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