Louis Parascondola> $$$$$ Chris, the schematic is correct, the Louis Parascondola> actual wiring is wrong. All units have one or Louis Parascondola> both problems. ALL units need some level of re Lou
Manfred, that is a TRULY AWESOME project, you are a very talented guy, my hat is well and truly off to you. Huge respect! -- Best regards, Chris Wilson. mailto: chris@chriswilson.tv _________________
Perhaps it doesn't know the words? :) -- Best regards, Chris Wilson. mailto: chris@chriswilson.tv _______________________________________________ Amps mailing list Amps@contesting.com http://lists.co
I would have thought you, of all people, might have liked high current HV coming into the home? ;) Thanks for the info re the QRO low pass filters Jim, in my post elsewhere. -- Best Regards, Chris Wi
02/11/2013 22:49 For normal transmitter testing I use the free software Audacity to create a two tone signal. My sound card is a Delta 44 and is good enough for these sorts of tests. The fun starts
04/12/2013 09:21 In many commercial high power tube amps the ceramic caps in the tune and load circuits are small value, paralleled up to create a bigger value. Is this because smaller values drift l
18/12/2013 13:16 I have built an amplifier change over relay set housed in a die cast box containing two small SPNO vac relays and a coaxial input change over relay. These are controlled by a separat
14/01/2014 11:52 Are there any working examples of amplifiers using Pi-L networks with a permeability tuned tuning coil, but also using taps on it? Thanks. -- Best Regards, Chris Wilson. mailto: chri
Maybe people wonder why I ask? I have a Henry 2000D RF generator a friend and I are converting to a 10n meter linear. It's near as damn it done now, a simple thing for many on here, a challenge for u
I have an older ARRL Handbook showing a coil that is compressed and allowed to re-expand via an internal threaded rod and two (Teflon?) plates at either end. I have a Russian R-140 tetrode amp that u
Hello peter, I always point people making metal "boxes" to a YouTube video of a guy with a box pan folder in his (or probably his landlord's) living room. Proud as punch of his new toy he quickly rea
I think if you like the retro look building a vintage style amplifier, outward appearance wise, can yield good results on a budget. Trying to create something to rival a current mainstream "black box
Hello Denis, I am not sure how similar my Megger HV tester is internally. Externally it is not the same. But by all means have a look at the factory manual, which has circuit diagrams. I have put it
Hello David, I use these, various sources have these from time to time, on Ebay: http://www.ebay.co.uk/itm/HP-253232-001-BL20p-3000W-PSU-POWER-SUPPLY-/300908478716?_trksid=p2047675.l2557&ssPageName=S
Hello PACER99, Personally I welcome the odd link to RF parts on Ebay from group members. Perhaps if the subject had a "For sale" insertion those not wanting to see them could just filter on the subje
Hello Donroden, Here in the UK specialised RF parts are now hard to source. Ebay has been a Godsend for me, as has the unique knowledge people in reflectors like this have been happy to share. Any bl
31/03/2014 12:15 Anyone any insight as to how, and at what stage of their production, vacuum variable capacitors are evacuated? Do makers offer any service to check the depression in them and re-evac
Hello Gary, My condolences, it sounds as if he led an interesting and fulfilling life and was fortunate to reach a very respectable age indeed. -- Best regards, Chris mailto:chris@chriswilson.tv ____
Hello Jim, For some reason I have been unable to access that link, does it contain the schematic for the standard HP 50V supply? Thanks. -- Best regards, Chris mailto:chris@chriswilson.tv ___________
Hello Jim, Thanks very much, got it now baruch also fired it to me by direct mail. Very useful, but a shame this durable and popular HD supply has never seemingly had a schematic issued. -- Best rega