FS Silk grid chokes - diyAudio
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Old 26th October 2012, 01:51 AM   #1
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Default FS Silk grid chokes

I have a pair of Silk grid chokes. I bought them at diyhifisupply for $160 a pair plus $26 shipping. Tried them on my amp for one day and decided to revert to stock grid leak resistor.

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Last edited by ClefChef; 5th November 2012 at 02:29 AM.
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Old 26th October 2012, 02:03 AM   #2
limono is offline limono  United States
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what are the specs on the chokes?
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Old 26th October 2012, 02:41 AM   #3
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From diyhifisupply website:

Characteristics:


There are many gird choke in the market but this one is different - High inductance Grid Choke with low DCR and capacitance:


This is one of those major tweeks that lets you hear every well-spent penny. This is the "Ultimate Inductor" since its inductance is more than 7,000 Henry at 12Hz while having very low DCR of just 1.3K ohm.
AC impedance at 1KHz is more than 5 Mega ohm! AND has a very low parasitic capacitance of only less than 20pF. This is 1/10th s the typical tandard grid resistor. Immediately noticeable is improvement in high frequency response.


Wiring:


This choke has three taps, the middle one is for making phase splitter in push-pull circuit.


Dimension:
LxWxH : 37 x 32 x 32mm

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Old 26th October 2012, 06:06 PM   #4
beeah is offline beeah  United States
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Quote:
Originally Posted by ClefChef View Post
Tried them on my amp for one day and decided to revert to stock grid leak resistor.
If that's not a ringing endorsement, I don't know what is!
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Old 26th October 2012, 06:14 PM   #5
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Quote:
Originally Posted by beeah View Post
If that's not a ringing endorsement, I don't know what is!
It has nothing to do with endorsements, it's just that I have to change my coupling caps in order to accommodate these chokes (on 300b grids), and my caps cost as much as those chokes...
LC resonant frequency, you know...
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Old 26th October 2012, 06:20 PM   #6
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Clef, did you find the sound was much clearer but the bass was almost none existant when you used them? I tried them and did not go on them at all.
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Old 26th October 2012, 06:32 PM   #7
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These chokes have enough inductance not to introduce bass roll off, but as I mentioned previously the coupling capacitor size may have to be increased (or decreased). Chokes have better dynamics and may also help with tube bias.
My grid resistor is 210k so grid choke difference is not that huge.
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Old 30th October 2012, 04:54 AM   #8
tyo94 is offline tyo94  Indonesia
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Clef, do you ship international?
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Old 30th October 2012, 05:44 AM   #9
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Originally Posted by tyo94 View Post
Clef, do you ship international?
Where to?
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Old 30th October 2012, 06:34 AM   #10
tyo94 is offline tyo94  Indonesia
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Quote:
Originally Posted by ClefChef View Post
Where to?
to indonesia
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