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Hi All I am busy with a new valve amp project, and I was looking for ideas on power and standby pilot lights. I see online that McIntosh amps illuminate their valves. Looks quite cool. I am using KT88s, 6SN7GTs and 6CG7s. It seems only the 6CG7s can be illuminated from below as the other two...

No longer imported into SA. What a shame!

Does anybody have any experience with these amps they would care to share? I may be able to pick up the pair in very clean condition for a song. They get a fair review for their time.

How about that? My mate arrives and says he has brought me his dad?s Lenco L75 TT. I haven?t really inspected it, but it looks to be in very good condition. It has a Goldring cart, if I?m not mistaken. Really cool as I used Goldring kit in the 70?s. Although, I must say, I liked Stanton M890...

Hi Older guys. Remember the old 27C128 range of EPROMS? Has anyone heard of password protection on these devices? I didn't think it was possible.

I have a pair of Paradigm Atom V3s and the surrounds are failing. In addition to the thread on speaker repair people, is there anyone who is good with these speakers? i don't want some generic cone that just happens to fit. Cape Town area. Many thanks.

I'm looking for ideas. I need to design something for industrial applications, not hi-fi. I'm looking for an op-amp. I have used millions of LM324s over the years, the OPxx ranges, LF351 etc. My "favorite" was the OPA177GP. I need three op-amps, so singles, dual or quad packages are okay. Low...

Hi Guys Well, maybe not a real public service, but I thought I might share my findings for those DIY guys who may benefit from many years of experience. I do quite a lot of electronic repairs and analysis, after hours, for industrial and commercial clients. My own interests are in hifi and other...

I recently made big changes to my braai room, Man cave, office area. Tonight I really felt the need to reconnect some of my stuff. So I plugged in my oldest speakers, circa 1980, Fane 12? drivers, twin cone, with piezo tweeters (yes I know, I?m no good as an audiophile), my home built valve...

Maybe a dumb question, I know. Here goes, anyway: Are they really that good?

Hi Guys Any pointers on a fair quality logarithmic dual gang 100k Pot? Alps? I'm not really coming right with RS or mouser. Any comment or pearls of wisdom?

I really like marmalade, all sorts of different types. Being diabetic, I don?t have it daily, but I like it. So here is the issue: How to make some interesting marmalade schnapps? I have a few bottles of peach schnapps/mampoer whatever that I distilled a coupe of years ago.  I think I?ll just...

Good Evening Mr Ampdog and all the other knowledgeable souls on this forum. Some of you may recall, I am busy planning my next amplifier, a valve amp. I have settled on one of the designs shown to me here on the forum, the one I have named "Sy's KT88 amp". I'll post a pic of the schematic...

Hi Guys I am looking for one end bell cover for my power transformer, no holes, no feet, just plain smooth all round. I seem to have a slightly odd EI lamination size. I measure 135 x 113mm and the hole centers are 113 x 90mm. 6mm bolts. any help or advice gratefully received. Thank you.

Hi All Any suggestions for a good audio op-amp? Something a bit better than the old LM741/324 kind of stuff. I have had good service in industry from the OPA177GP. Through hole DIL packages only, please. Dual supply available. Low noise. No high gain or exceptional bandwidth or slew rate required.

Hi Have many of you used Watford Valves in the UK? My order is not arriving, they are not answering their mail and the courier tracking number tells me the purchases left London 05 Feb. Any experiences?

Hi Guys I deal a lot with electrical harmonic analysis, more and more every week. I have a really deep question for those who (hopefully) understand these things. I understand negative sequence harmonic currents, zero sequence and positive sequence harmonics - no problem. My new analytical...

Anybody know these caps? For use inter-stage-coupling caps in a valve amp. Watford Valves has them. I see Phillips "Orange drop" caps are also popular, but there are different types to choose from. Anyone wish to offer advise please?

I am looking for a cheap or free drawing package, electronic diagrams only. The one I was using was not very good (free so what does one expect I suppose). Any recommendations?

Hi All I see in one circuit the author talking about elevating the heater voltage (percentage of the HT) to avoid exceeding the cathode/filament rating. In the Genalex KT88 data sheet, it states Vh-k as 200/250V. In the schematic I am looking at, the cathode is 10 ohms away from ground, so maybe...