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February 10th, 2018 11:59
Just a nice picture of the operational amplifier..
Telefunken RV218 and AL4
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January 7th, 2018 10:32
I was always curious about performance of a higher priced cartridge in my system. Not many distribitors or retail handlers allow this as a cartridge is easily damaged and once it is used, it obviously c
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January 2nd, 2018 12:00
A nice comparison between mesh- and solidplate, directly- and indirectly heated rectifiers.
From left to right: RGN4004, UU5, unknown (British?) and 2B-400.
Valve rectifiers
So, the unknown (probably British made) is th  Read more...
December 31st, 2017 17:27
Yet another rectifier for trials.. This time with a mesh anode.
RGN4004 Telefunken
RGN4004 Telefunken
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December 29th, 2017 20:49
Replaced the (tiny) GZ34 by a pair (somewhat bigger) half-wave rectifiers.. 
CV235 CV187 U19
Looking good, matching the RV218. Soundwise these are a bit different. Voltage-drop in this choke-input powersupply  Read more...