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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: input impedance of Don Allen linestage? posted by Chuck on April 26, 2015 at 06:14:07:
"Is it just a matter of applying the leads of a VOM multi-tester to the hot and ground of an input jack on the preamp and testing for resistance?"
In the case of a well designed active tube linestage, this is literally all you need to do. Be sure to run the volume control through it's whole range, just to see if there are any minimums.
If you were to buy a sub-$100 tube "preamp" on eBay that ran something like a 12AU7 on a 50-60V switching supply, despite having a 50-100K volume control pot, operational issues with the tube itself would drop the input impedance down to 1K or so. (I don't think you'll run into that issue)
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Follow Ups
- RE: input impedance of Don Allen linestage? - Caucasian Blackplate 09:46:31 04/26/15 (3)
- RE: input impedance of Don Allen linestage? - Chuck 11:47:26 04/26/15 (2)
- RE: input impedance of Don Allen linestage? - Caucasian Blackplate 23:25:46 04/26/15 (1)
- thank you (nt) - Chuck 04:22:38 04/27/15 (0)
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