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Vintage Synth Repair

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Re: [vintagesynthrepair] Re: Arp Omni 1 master oscillator / buffer question.

2011-11-15 by evening1

Of course it's always best to replace parts w/ the original type, but the initial design choice may have been based on the limits of manufacturing processes at the time - it was 1975 after all..

61+ caps @ $2 ea. vs $0.12 each for the 'lytics just seems like a lot to invest, compared to the street value of the instrument.. (at least here in the NY area).

I'm not always a cheapskate though :-)

I've recapped two Omni 2's in the past few years - on the first (which was in really fine shape) I sourced some NOS tants - lovely red globules.
The next time around I went with cheap electrolytics since the unit was rather beat up - the result was nowhere near as aesthetically pleasing.

I now have an Arp Quadra on my to-do list and I will go with tants on the voice boards and Sprague in the supply because of the condition and rarity of the instrument.

I agree that adding a second board to hold the larger cased caps wouldn't be worth the effort..

jmw

This weekend's project:: Octave Kitten rev 1 - beautiful shape, w/ a half-dead power supply and who knows what else....






On Tue, Nov 15, 2011 at 1:22 PM, jack <jammie.emma@...> wrote:

get the tantalum if they wanted an electrolitic they would of put 1 there and tantalum caps are not that expensive
----- Original Message -----
Sent: Tuesday, November 15, 2011 6:17 PM
Subject: [vintagesynthrepair] Re: Arp Omni 1 master oscillator / buffer question.

I know; I tried to do so on the 22uF. My local dealer only had radial for this value, but once back home, I was disappointed; the footprint is far bigger and there not enough room on the PCB. I bought an extra PCB to set the electrolytics, but the complexity doesn't worth the saving.
I have to check with another dealer the other side of the town if they have axial.

--- In vintagesynthrepair@yahoogroups.com, evening1 wrote:
>
> You can use electrolytics to replace the tantalum caps and save some cash.
>

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