Resistors

deltaunit · 3299

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Offline deltaunit

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on: May 04, 2011, 06:56:05 AM
I was just looking in the crack manual and noticed the 2.49k resistor is listed as a .25w on the parts list and as a .125w on the circuit diagram.

Which is the correct value, also would a 2k4, 2k5 or even 2k7 resistor be a suitable replacement?

Cheers
« Last Edit: May 04, 2011, 08:02:55 AM by deltaunit »


Offline Doc B.

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Reply #1 on: May 04, 2011, 07:40:12 AM
Any of those values will work - 1/2W,1/4W, 1/8W power rating and anything around 2-4K ohms.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline deltaunit

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Reply #2 on: May 04, 2011, 08:02:42 AM
Thanks Doc.

Does anyone have any experience of fancy 'audiophile' resistors, can they be a worthwhile upgrade?

If so which ones to upgrade, the last pair on the headphone socket? Which type?

Cheers


Offline Grainger49

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Reply #3 on: May 04, 2011, 10:01:01 AM
Looks like that is the "Bleeder" resistor for eliminating any DC that might leak through the coupling cap.  The FP, Eros and Seduction have them too.  I wouldn't consider it an audio path resistor, so not anything to upgrade.  The volume pot and output cap, 100uF at 160V are in the audio path and is well worth upgrading.  I would also consider the third 220uF at 250V power supply capacitor as a good upgrade part.
« Last Edit: May 04, 2011, 10:03:00 AM by Grainger49 »


Offline deltaunit

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Reply #4 on: May 04, 2011, 10:09:54 AM
Thanks Grainger, I've already ordered an Alps Blue pot and some Ansar Supersound polys for the coupling caps, I think that covers the stock signal path upgrade possibilities. I was just wondering if there was anything else to consider as the next part of my hotrodding experiment :).

Oh, and I have huge overspecced ps caps on order too :D


Offline Grainger49

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Reply #5 on: May 04, 2011, 10:17:48 AM
There are several threads on Crack upgrade parts in the Crack folder.  Looking at the schematic I don't know if there is anything else I would upgrade, but I would roll tubes for a year or two.


Offline deltaunit

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Reply #6 on: May 04, 2011, 10:29:59 AM
Indeed, I lucked out straight away by finding a Mullard CV4003 in grab bag of 3 valves for about


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