[quote name='jensenmann' timestamp='1432325372' post='2780599']
In the meantime I´m a bit further with my DIY basspreamp quest. The BP1 finds no use anymore. I´ve perfboarded a 3 stage FET preamp with with the intention to simulate the Bassman 135 preamp wit FETs. It has one volume control and a bright switch with 5 frequencies which sounds nice. After fiddling with a tonestack which I didn´t like I finally added a trusty workhorse EQ which I know very well from my studiowork. It´s a DIYed API553-stylee 3 band swinging input EQ. For techies: It´s inductor based, low and mid band proportional Q bell filters and a shelving HF filter. All bands have 3 switchable frequencies which are optimized for my basses. Finding the good sounding frequencies took 10hrs alone... The output stage is a Melcor DOA driving an API 2623 transformer.
Here´s some porn, inside: [url="http://www.directupload.net/file/d/3985/fqao7pgu_jpg.htm"]http://www.directupl...qao7pgu_jpg.htm[/url]
Outside, the one with the silver frontpanel: [url="http://www.directupload.net/file/d/3985/k8mifzzz_jpg.htm"]http://www.directupl...8mifzzz_jpg.htm[/url]
No tubes, sorry....
The single G9 PTP Basspre is in the works, too. The layout and most of the drillwork is done, turretboard stuffed... Pictures to follow...
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Good work!
Looking forward to seeing your ptp G9 when it's done!