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In Reply to: Anyone know the output impedance of a Mcintosh MX110Z or any vintage tube preamp? posted by jfine on July 6, 2012 at 17:44:12:
Specs are widely available in print in old magazines. Don't depend on the net for vintage specs.
Some cathode follower outputs can work into a 600 Ohm line. Any cathode follower can drive any 10K Ohm amp input and can usually cope with 1000 Ohms and up. A simple plate follower, without feedback to lower the impedance, plus depending on the output tube, can have a high impedance output. Add feedback to that plate follower, like in an Eico HF-85 or Lafayette KT-600, and the output impedance is lowered to the 5K Ohm realm. Remember that the load, the power amp or line amp you will be driving with your 110, should always be higher in impedance than the listed spec. However, it need not be ten times that spec. What will you be thinking of driving with your MX-110 ? It does have a cathode follower output; yes ?
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Follow Ups
- Depends on some factors... - Interstage Tranny 07/6/1218:54:48 07/6/12 (6)
- RE: Depends on some factors... - jfine 19:14:58 07/6/12 (5)
- RE: Depends on some factors... - oldmkvi 20:44:48 07/6/12 (4)
- RE: Depends on some factors... - jfine 21:03:05 07/6/12 (3)
- RE: Depends on some factors... - oldmkvi 21:13:08 07/6/12 (2)
- RE: Depends on some factors... - jfine 21:23:27 07/6/12 (1)
- Call McIntosh. They have Tech Support and - oldmkvi 21:35:39 07/6/12 (0)
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