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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: RE: Tweak, but not really? posted by Lee of Omaha on October 19, 2016 at 15:35:57:
"I would like to hear the difference upgrading power supply and changing audio-path capacitors would make"
As the list indicates, the caps are part of the Modaferri mod:
Install Hysteresis Modification
Modify IF amplifier output stage to reduce IF noise radiation at 9th and 10th harmonics of IF (96.3 MHz and 107.0 MHz)
Replace all audio coupling and bypass capacitors in the feedback circuits with High Quality Metalized polypropylene capacitors
Install bypass caps in the power supply (Tube Units)
Modify the Stereo Decoder to improve Stereo Separation
Modify the Stereo Decoder for higher Slew rate and Stereo Separation
Optimize pilot carrier limiter circuit
Change muting and 19 KHz circuits for more reliable muting and stability of the stereo decoder (Tube Units)
Re-route IF cable from IF chassis to detector to eliminate tailbiting at 96.3 and 107.0
Modify Narrow Filter to accept over modulating stations.
Front end modified for higher RF selectivity
Adjust IF gain
Perform complete RF, IF and MPX alignment
Convert to 220 Volt operation - if required
Change de-emphasis to European Standard - if required
Listening check
Install Cardas output connectors
Unit will now exceed original factory specifications
Run performance graphs
Clean chassis, controls, panel and knobs
Unit signed and dated (inside) by Richard Modafferi
Selectivity modification
The price of the mod ($1k) is more than the cost of purchasing a nice unit.
Upgrading from a budget SS tuner, it's easy to hear the quality of the Mac. I now have NEAR CD/record sonics that is convincing. I probably could step it up with a proper roof antennae and NOS tubes. Other than the audio tubes(2) It's my understanding fussing with the others would affect the performance since it was tuned/retubed recently. It locks on any station and quiet. Guess I will just leave it alone and enjoy.
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Follow Ups
- RE: Tweak, but not really? - dirtyvinyl 17:29:56 10/19/16 (0)
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