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4P1L PSE Amplifier for Sale!
Firstly, my apologies to all readers for not writing much over the last year. Things have gone a bit crazy between work and family commitments. Also, modular synthesiser work has taken a lot of...
View ArticleWebsite restored
It’s been a few painful days, however the website is now back up and running. The site suffered a malware attack and was used for phishing attacks. Who knows how it happened, despite having malware...
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6E6P-DR curves (6Э6П-ДР)
Here are some curves of this great valve I traced time ago, hope these are useful when designing a stage with them. Unfortunately the variance of the valve’s parameters is all over the place. Hence...
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Merry Christmas
It’s been long overdue, I know. At least we are here. Another Christmas to celebrate in a good way. A couple of days late this post, but hey at least I’m writing this entry Sun is shining I’ve been...
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Gassy nightmare
Ok, title isn’t very appealing. I know, however it truly reflects what I experienced over the past few days. Let me clarify before I start: a gassy tube developed a nice fault-finding journey. You...
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GU-50 SPICE Model
It’s been a while indeed. Mostly busy with my day job and family. However, spare time is dedicated to synthesisers – I’m designing and building modules for Eurorack – and playing and listening to...
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Short of sand
Firstly, my apologies. It’s been long overdue to get back on this blog. I receive several emails from people asking me to share more. I hope I will, when I get the time and energy to get back on hi-fi...
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I’m back
It’s been a long while, yes, I know. Life goes in particular ways, you can help that. Having said that, I’m now back after a long absence. Life has changed for me and have some more free time for a...
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Cap Multiplier PCB: build guide and BOM
Finally after many years, I managed to document this great PCB. If you already have this PCB and want the build guide and BOM please let me know. Here is an extract of the build guide for the ones who...
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CCS in power supplies
The use of CCS in HT power supplies is well known, however generally misunderstood why it can be a good addition to some circuits. There is an excellent article from Gary Pimm which has been lost and...
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LR8 reg: a handy utility block
I’ve used the LR8 reg a few times here and there, always with satisfactory results. Yet, I’ve never spent time looking into it with more detail, always helped me to fix a voltage reference needed....
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Hybrid mu-follower boards in SMD
I’ve been using these boards for many years now. Haven’t offered them as is required for anyone to be experienced well enough in SMD soldering to get these done effectively. I have a reflow oven so...
View ArticleHybrid mu-follower PCB (Ver 0.8) video
Over the past 5-years I have received several queries about the current limiter resistor and LED additions to the hybrid mu-follower PCB. Although these are explained, clearly not well enough from my...
View ArticleCX-112a preamp Video
The positive feedback encouraged me to record this second video. Unrehearsed rambling on the CX-112a preamplifier. Hope this is useful to many of you and would love to hear your feedback.
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SLCF to the rescue?
Over 7 years ago I made a run of a great circuit with a bit of a twist. The “Super-linear Cathode Follower” or SLCF is a great way of optimising the cathode follower stage and make it more linear by...
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