Over the weekend, I built a VERY simple pre-amp using a minimal number of components. To my ears, it's very transparent. At the moment I'm feeding it into a cheap Samson reference amplifier powering a pair of MS 816 speakers and it knocks spots off the old Technics hi fi amp that used to sit in my living room.
Most of the components can be soldered direct to the valve bases, and I used a piece of Veroboard for the power supply.
E80F/EF86 pre-amp
Most of the components can be soldered direct to the valve bases, and I used a piece of Veroboard for the power supply.
E80F/EF86 pre-amp
An externally hosted image should be here but it was not working when we last tested it.
The Borbelly was easy to clone and uses readilly available ECC83 and ECC81 valves
An externally hosted image should be here but it was not working when we last tested it.
Andy, the links don't seem to be working (and I'm interested in this one myself).An externally hosted image should be here but it was not working when we last tested it.
The Borbelly was easy to clone and uses readilly available ECC83 and ECC81 valves
An externally hosted image should be here but it was not working when we last tested it.
ImageShack® - Online Photo and Video Hosting
ImageShack® - Online Photo and Video Hosting
Let's see if it works this time.
ImageShack® - Online Photo and Video Hosting
Let's see if it works this time.
SY's Red Light District. Best pre I've ever built.
I think you mean the Heretical. I'm currently running a six channel version using the boards left over from the run you did.
The 6VA transformers were tiny and very cheap from RS.
I've just this second added them to my RS shopping basket!
Many thanks for the information.
If you buy the RS (Indian) transformers, be prepared to experiment with the secondary phasing. I thought 0-22 + 0-22 meant what it said but I had to swap a few wires around to get true 0-22 + 0-22. With no load attached you will not do any harm. It's a simple case of testing the windings to make sure that they are adding together and not anti-phase.
My first attempt gave me 15V DC - great for 9 x 22 V
My first attempt gave me 15V DC - great for 9 x 22 V
I think you mean the Heretical. I'm currently running a six channel version using the boards left over from the run you did.
Whatever...
Six way pot, or digital?
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