donmarrese
06-11-2020, 12:14
Alphason's only pre amp produced in the late 80's, (as far as I can find out) from the Mike Knowles stables. Physically in good condition, there's a problem with the phono stage, in that all LED's light up on PCB apart from the far right one....I've attached a GL75 to the phono section, and there's some sound coming out but it's overshadowed by a hum on both channels. 3 settings for MC and one for MM....very cool!
So, needs attention in the phono stage area, although the rest of AUX CD etc is fine. Sounds very very close to my upgraded Super Micro...willing to stick my neck out and say they're on par....(I've been doing A/B test for the last 3 nights....hard work!).*
I like the look of the shielded power supply, and the large caps, and generally the earth point being the centre of the PCB. 3 settings for MC phono stage...Nice design features for a good pre.
A nice project for lockdown, £130 + Postage of about £10 to UK only, or I can hand over at a distance, I'm based in Hornsey, London
Worth a lot more when sorted ...quality product...heard a whisper that Musical Fidelity had some input into the design of this... *forgot to say monitor button is missing...
https://uploads.tapatalk-cdn.com/20201106/b61070a51fc0525665c92a9fbaf61c77.jpghttps://uploads.tapatalk-cdn.com/20201106/4f727e5535ab9fcb469a66a3849e5156.jpghttps://uploads.tapatalk-cdn.com/20201106/e1d15db8ef051c1912f73a534a5ac9f4.jpghttps://uploads.tapatalk-cdn.com/20201106/2731879195034cad01fa7295a7ffb732.jpghttps://uploads.tapatalk-cdn.com/20201106/2c48203c03d19a7d1cea750b838525e4.jpghttps://uploads.tapatalk-cdn.com/20201106/41a4b059cddbfe07a3d54d7b52c1d3f5.jpghttps://uploads.tapatalk-cdn.com/20201106/a37751eaadaf77a6d7652f4d003cb3f3.jpghttps://uploads.tapatalk-cdn.com/20201106/b2f04d0187a06360f56e7f560587f9ab.jpghttps://uploads.tapatalk-cdn.com/20201106/dc59b68834af1399a13a6c1e9170cbab.jpghttps://uploads.tapatalk-cdn.com/20201106/5a6498a33f7eb90a9ad0e33f83cd3047.jpghttps://uploads.tapatalk-cdn.com/20201106/8eeff73c1f45a9050ce15085e2efcf20.jpghttps://uploads.tapatalk-cdn.com/20201106/f2d1808ed3f34b9ee7aeb0ede983e75f.jpghttps://uploads.tapatalk-cdn.com/20201106/4f9b2ad2b6b5f481f4d30a39374fa4c5.jpg
Sent from my ONE A2003 using 2 fingers
So, needs attention in the phono stage area, although the rest of AUX CD etc is fine. Sounds very very close to my upgraded Super Micro...willing to stick my neck out and say they're on par....(I've been doing A/B test for the last 3 nights....hard work!).*
I like the look of the shielded power supply, and the large caps, and generally the earth point being the centre of the PCB. 3 settings for MC phono stage...Nice design features for a good pre.
A nice project for lockdown, £130 + Postage of about £10 to UK only, or I can hand over at a distance, I'm based in Hornsey, London
Worth a lot more when sorted ...quality product...heard a whisper that Musical Fidelity had some input into the design of this... *forgot to say monitor button is missing...
https://uploads.tapatalk-cdn.com/20201106/b61070a51fc0525665c92a9fbaf61c77.jpghttps://uploads.tapatalk-cdn.com/20201106/4f727e5535ab9fcb469a66a3849e5156.jpghttps://uploads.tapatalk-cdn.com/20201106/e1d15db8ef051c1912f73a534a5ac9f4.jpghttps://uploads.tapatalk-cdn.com/20201106/2731879195034cad01fa7295a7ffb732.jpghttps://uploads.tapatalk-cdn.com/20201106/2c48203c03d19a7d1cea750b838525e4.jpghttps://uploads.tapatalk-cdn.com/20201106/41a4b059cddbfe07a3d54d7b52c1d3f5.jpghttps://uploads.tapatalk-cdn.com/20201106/a37751eaadaf77a6d7652f4d003cb3f3.jpghttps://uploads.tapatalk-cdn.com/20201106/b2f04d0187a06360f56e7f560587f9ab.jpghttps://uploads.tapatalk-cdn.com/20201106/dc59b68834af1399a13a6c1e9170cbab.jpghttps://uploads.tapatalk-cdn.com/20201106/5a6498a33f7eb90a9ad0e33f83cd3047.jpghttps://uploads.tapatalk-cdn.com/20201106/8eeff73c1f45a9050ce15085e2efcf20.jpghttps://uploads.tapatalk-cdn.com/20201106/f2d1808ed3f34b9ee7aeb0ede983e75f.jpghttps://uploads.tapatalk-cdn.com/20201106/4f9b2ad2b6b5f481f4d30a39374fa4c5.jpg
Sent from my ONE A2003 using 2 fingers