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How to seach digikey for the right Capacitors Single-Channel Preamps
Old 8th June 2018
  #1
Gear Maniac
How to seach digikey for the right Capacitors

Hey Guys,

I'm sure there is an easy solution to this one, but I haven't been able to find a guide yet who can help me out with this one. So, my scully 280 preamp is overdriving at super low volumes. I need to make a PAD for it (15/20dbs) and recap the playback card.

I found a caps part list for it (page 7-11 about 2/3's down the page)

http://www.technicalaudio.com/pdf/Sc...280_manual.pdf

Some of them say:

TE 1061 // 150-3 D.C. // 6630 Y1 (This one appears to be metal / silver)
330pF // +-1% // 100V (This one is blue and looks more like a resistor?)
GE 2N508 A (This one looks like a hat, hehe)
Sprague // 0.1 +-10% // 200DC (This on is red)
TE 1064 // 200-3 D.C. // 6730 HJ (This one is silver)

Anywho, I'm not sure which of these I have to change, how to catagorize what type of Cap they are, and how to simply search for them.

I'll include a picture of the card. If anyone could be of help and tell me how to determine these things or even go as far as circling the parts I need to change that would be so amazing.

Thanks, Folks! I don't know where I'd be without you
Attached Thumbnails
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Old 10th June 2018
  #2
Gear Maniac
bump!
Old 7th October 2018
  #3
Lives for gear
 
jitterybit's Avatar
TE is an aluminum electrolythic. Vishay appears to still make them. Nichicon as well, I think.

The 2N508 appears to be a germanium npn transistor from what I can find
Gonna probably have to find one NOS. Can't see its function but not doing so could change the tone/breakup
2N508
Datasheet, Equivalent, Cross Reference Search. Transistor Catalog


Not sure about the 33pf one but any decent cap would probably work. Maybe a polystyrene?

The sprague is probably a polypropylene.
I know that this isn't 100% whatyou're after but maybe it will help some.
I'm just a former AE going to Scholls from EE and others here will be more suited to answer better and correct me.
If you can locate the parts and find a value code on them, would be helpful. Here's a good cheat sheet
https://cdn.shopify.com/s/files/1/00...g?v=1358132444

If not, and Google doesn't work, you can always measure the caps with a DMM and go from there.


Good luck.
Old 9th October 2018
  #4
Gear Maniac
Wow, thanks for taking the time to write this all out for me! I appreciate you


Quote:
Originally Posted by jitterybit View Post
TE is an aluminum electrolythic. Vishay appears to still make them. Nichicon as well, I think.

The 2N508 appears to be a germanium npn transistor from what I can find
Gonna probably have to find one NOS. Can't see its function but not doing so could change the tone/breakup
2N508
Datasheet, Equivalent, Cross Reference Search. Transistor Catalog


Not sure about the 33pf one but any decent cap would probably work. Maybe a polystyrene?

The sprague is probably a polypropylene.
I know that this isn't 100% whatyou're after but maybe it will help some.
I'm just a former AE going to Scholls from EE and others here will be more suited to answer better and correct me.
If you can locate the parts and find a value code on them, would be helpful. Here's a good cheat sheet
https://cdn.shopify.com/s/files/1/00...g?v=1358132444

If not, and Google doesn't work, you can always measure the caps with a DMM and go from there.


Good luck.
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