This is my first post on the tube forum, quite possibly there is no answer for this.
I was wondering if any body knows if there are any schematics for phono pre amps built around the Raytheon 6418 sub miniature pentodes.
There is a mic amp, and headphone/pre amp available from Oatley electronics in OZ.
The above ones work on battery power and by all accounts actually sound rather good.
I suspect they may also work well for phono use, probably with boosting via and IC.
I was wondering if any body knows if there are any schematics for phono pre amps built around the Raytheon 6418 sub miniature pentodes.
There is a mic amp, and headphone/pre amp available from Oatley electronics in OZ.
The above ones work on battery power and by all accounts actually sound rather good.
I suspect they may also work well for phono use, probably with boosting via and IC.
Take a look at the mirror of Steve Bench's site, he designed a submini pre around 6088 and 6418 which might be of interest. (He used the 6418 as anode followers to drive a tape out.)
6088 Based Battery Powered Full Feature Preamp
6088 Based Battery Powered Full Feature Preamp
Thanks for the tip Studeb, that is a recent addition I knew nothing about and I suspect it might work quite well, plenty of scope for modding and the price is sweet too.
I will order one and build it up.
I think I can keep the microphonics under control and balancing channels will be easy enough.
I will order one and build it up.
I think I can keep the microphonics under control and balancing channels will be easy enough.
Progress
Hi Zero One,
any progress with this? I did see that the guys at the Melbourne Audio Club built one with upgraded components and an improved power supply and noted:
I would say whichever way you go on to build the kit, you will not be disappointed. In a blind listening test the basic kit outperformed two Cambridge phono preamps and a Hafler phono preamp in front of six very critical listeners of the Melbourne Audio Club, across three different turntables and cartridges. Impressive!
Thanks for the tip Studeb, that is a recent addition I knew nothing about and I suspect it might work quite well, plenty of scope for modding and the price is sweet too.
I will order one and build it up.
I think I can keep the microphonics under control and balancing channels will be easy enough.
Hi Zero One,
any progress with this? I did see that the guys at the Melbourne Audio Club built one with upgraded components and an improved power supply and noted:
I would say whichever way you go on to build the kit, you will not be disappointed. In a blind listening test the basic kit outperformed two Cambridge phono preamps and a Hafler phono preamp in front of six very critical listeners of the Melbourne Audio Club, across three different turntables and cartridges. Impressive!
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