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#26 pre amp
#26 pre amp
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Old 1st December 2013, 12:41 PM   #3471
Noodle88 is offline Noodle88  Malaysia
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Quote:
Originally Posted by stajo View Post
Neat. What is the L values in filament chokes?
0.7 Hy / 1A as shown in the photo.

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Old 1st December 2013, 01:15 PM   #3472
king4joy is offline king4joy  Hong Kong
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Quote:
Originally Posted by merlin el mago View Post
Works:Pia no::che ers:
Where was the problem please??
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Old 1st December 2013, 02:27 PM   #3473
merlin el mago is offline merlin el mago
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I guess a cold joint in the RCA input.
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Old 2nd December 2013, 01:28 AM   #3474
king4joy is offline king4joy  Hong Kong
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Old 28th December 2013, 11:12 AM   #3475
merlin el mago is offline merlin el mago
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I have to take off the 100K grid leak resistor if I want to use 50K ladder attenuator or have I to left?
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Old 28th December 2013, 11:52 AM   #3476
Noodle88 is offline Noodle88  Malaysia
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Hi! Merlin,

Tough that you have your AVC already ?
Why putting a 50k pot ?

Cheah
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Old 28th December 2013, 12:59 PM   #3477
merlin el mago is offline merlin el mago
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Hi Cheah,

I only want to check if my TVC lack of bass.
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Old 28th December 2013, 01:10 PM   #3478
Noodle88 is offline Noodle88  Malaysia
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Merlin,

Did you put your AVC at the input or output (after the opt)?

Cheah
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Old 28th December 2013, 01:29 PM   #3479
nicoch58 is offline nicoch58  Europe
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with 100k in place as // 50k the total will be 33k .... not a problem if the source can drive it,btw not low ....
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Old 28th December 2013, 02:14 PM   #3480
Brouilly is offline Brouilly  United Kingdom
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Taking some time to address the grounding in my #26 preamp as there is some noise, and I got some interesting results with the frequency response.

There is a large peak at about 70KHz. If possible it would be great to get some insight on what might be causeing the instability. Has anyone else seen similar results...?

Setup is very simple - filament bias, LL1660 output

Thanks
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