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Tube DIY Asylum: Re: Stepped attenuator with low profile for Fi Y pre? by restock Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Stepped attenuator with low profile for Fi Y pre? posted by Dave Cigna on January 12, 2006 at 16:06:34:
Dave, thanks so much for your comments. I don't quite like the idea of running a larger resistor in series either, although this is pretty much what some of the tube preamps use to reduce the large gain from 20dB to 12db or so (e.g. Wright, Fi, etc).
Unfortunately, the fixed resistors will probably add their own flavor to the sound (though you're probably used to this without knowing it if you've been running down around 7 - 9 o'clock'; the sound of the pot itself...)I have to say though that "pot" sound quite good. I can't complain about the overall sound of the Fi Y at all.
As a quick fix you could try adding resistors of 2 or 3 times the pot value in series before the pot - just what Don recommended. At least that will let you run where the tracking is better.That is probably the way I might go for now. I just haven't decided on whether to add the higher value resistors internally, or to add the adjustable Endler attenuators up front. The Endler would give me more flexibility (I could even just use them as a passive) and it uses fairly good and channel matched resistors as well.
Thanks again,
Rene
"I wouldn't trust (no) words written on no piece of paper."
Jim Jarmusch, DEAD MAN 1995
"I wouldn't trust (no) words written on no piece of paper."
Jim Jarmusch, DEAD MAN 1995
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Topic - Stepped attenuator with low profile for Fi Y pre? - restock 17:25:53 01/11/06 ( 27)
- I trust you know two inputs have reduced gain for use with high output sources(nt) - Russ57 07:44:04 01/13/06 ( 1)
- Yep... - restock 10:30:36 01/13/06 ( 0)
Re: Stepped attenuator with low profile for Fi Y pre? - Dave Cigna 16:06:34 01/12/06 ( 1)
- Re: Stepped attenuator with low profile for Fi Y pre? - restock 01/13/06 10:43:34 01/13/06 ( 0)
So far two that should fit... - restock 12:52:01 01/12/06 ( 0)
You might try a law faked linear (Vishay/Sfernice cermet)(nt) - Russ57 12:14:16 01/12/06 ( 1)
- Completely agree with Russ - law faking - andy evans 14:30:55 01/12/06 ( 0)
Measuring the tracking differences... - restock 23:10:32 01/11/06 ( 5)
- Re: Measuring the tracking differences... - fatbottle 05:00:52 01/12/06 ( 4)
- To refresh yr memory... - cheap-Jack 07:36:11 01/12/06 ( 3)
- I must apologise for this , I'm being stalked by Cheap Jack.... - fatbottle 07:40:14 01/12/06 ( 2)
- Sorry, c-J stalked you, again ! - cheap-Jack 07:56:32 01/12/06 ( 1)
Re: Stepped attenuator with low profile for Fi Y pre? - dave slagle 18:28:40 01/11/06 ( 13)
- Re: Stepped attenuator with low profile for Fi Y pre? - restock 18:45:00 01/11/06 ( 12)
- Get to the root of the problem - too much gain. - cheap-Jack 09:18:17 01/12/06 ( 0)
- Re: Stepped attenuator with low profile for Fi Y pre? - dave slagle 19:09:59 01/11/06 ( 2)
- YES ! - cheap-Jack 07:47:33 01/12/06 ( 0)
- Re: Stepped attenuator with low profile for Fi Y pre? - restock 20:57:09 01/11/06 ( 0)
Re: Stepped attenuator with low profile for Fi Y pre? - GEO 19:00:43 01/11/06 ( 7)
- Re: Stepped attenuator with low profile for Fi Y pre? - restock 21:05:14 01/11/06 ( 3)
- Re: Stepped attenuator with low profile for Fi Y pre? - GEO 05:53:02 01/12/06 ( 2)
- Re: Stepped attenuator with low profile for Fi Y pre? - restock 08:25:49 01/12/06 ( 1)
- Re: Stepped attenuator with low profile for Fi Y pre? - kyle 12:58:07 01/12/06 ( 0)
Re: Stepped attenuator with low profile for Fi Y pre? - restock 21:02:26 01/11/06 ( 0)
Re: Stepped attenuator with low profile for Fi Y pre? - dave slagle 20:38:40 01/11/06 ( 1)
- Re: Stepped attenuator with low profile for Fi Y pre? - GEO 05:51:17 01/12/06 ( 0)