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References: [ +from:w8jitom@worldnet.att.net: 69 ]

Total 69 documents matching your query.

21. [AMPS] Building 811A Amp (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Wed, 05 Mar 1997 20:13:31 -0500
I have some good used ones for free. They do not need to be matched. Two days after you start using them, they won't be matched any more anyway. These isn't a push pull class A audio system or instru
/archives//html/Amps/1997-03/msg00062.html (7,303 bytes)

22. [AMPS] LETS CHEW EVEN MORE (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Thu, 06 Mar 1997 08:14:50 -0500
Don't count me in with that "we". :-) There is no set ratio of peak envelope power to average power, and it certainly isn't referred to as RMS power, it is average power. The ratio of PEP to average
/archives//html/Amps/1997-03/msg00064.html (7,639 bytes)

23. [AMPS] Sum Newz (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Thu, 06 Mar 1997 08:34:48 -0500
Hi John, That is another method. I use that with my IC-706 and Yeasu 757. I have an external bias supply, and feed a fixed ALC voltage back into the ext ALC port through a diode. The amps ALC can inc
/archives//html/Amps/1997-03/msg00065.html (8,687 bytes)

24. [AMPS] tuning and such (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Thu, 06 Mar 1997 22:47:44 -0500
In a grounded grid AB2 amplifier, grid current is the best indicator of proper tuning. touchup? If you observe a noticable increase in grid current, or a reduction in output, it is certainly time to
/archives//html/Amps/1997-03/msg00074.html (9,527 bytes)

25. [AMPS] tuning and such (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Fri, 07 Mar 1997 08:09:19 -0500
NEVER CW have easily Doesn't matter, the meter never reads peak current except with a sustained tone or carrier. Anything you see is an average, unless you drive the meter with a peak storage circuit
/archives//html/Amps/1997-03/msg00083.html (9,405 bytes)

26. [AMPS] MORE ON PEP (TOM) (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Fri, 07 Mar 1997 22:51:57 -0500
Lou, Please do not re-phrase what I say in your "informational" posts. Envelope is the key word Lou. Peak ENVELOPE power. You can find this on page 6.7 of the '95 ARRL Handbook. The ARRL Handbook say
/archives//html/Amps/1997-03/msg00086.html (7,877 bytes)

27. [AMPS] Re: Anonymity (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Fri, 07 Mar 1997 23:13:48 -0500
Oh ohhh, I've been fooled on this one! I get it now it sounds like "Croaking" and is spelled "QRO - king". I thought it was someone trying to be serious,who just didn't understand basics. I didn't k
/archives//html/Amps/1997-03/msg00087.html (7,171 bytes)

28. [AMPS] some basic questions (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Fri, 07 Mar 1997 23:28:31 -0500
You have to micro polish the air variable plates. Normally that is done by tumbling them in ground Walnut shells. You will never polish the plates well enough by hand to restore full breakdown voltag
/archives//html/Amps/1997-03/msg00088.html (9,160 bytes)

29. [AMPS] Re: conjugate match (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Sun, 09 Mar 1997 09:47:58 -0500
Orr's statement is incorrect. This is a topic many amateur texts get wrong. The only person who wrote anything for amateur texts that has it all correct is Walt Maxwell, in his book Reflections. The
/archives//html/Amps/1997-03/msg00092.html (12,547 bytes)

30. [AMPS] matching (woops) and Transformer sag (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Sun, 09 Mar 1997 19:01:50 -0500
I intended to delete more of my post than I did. I appologize. John ON4UN and '2RK Bob made good points. The next issue of Communications Quarterly will have an article on Conjugate Matching. Jack Be
/archives//html/Amps/1997-03/msg00096.html (7,308 bytes)

31. [AMPS] SB221 Switches (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Mon, 10 Mar 1997 11:45:52 -0500
snip The wafers used in all the Ameritron switches interchange with the Heathkits but have higher voltage breakdown. Some surplus companies sell parts for more than twice the new wholesale price of
/archives//html/Amps/1997-03/msg00108.html (6,964 bytes)

32. [AMPS] Sagging supply (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Mon, 10 Mar 1997 11:51:57 -0500
Remember you are checking a capacitor input supply, which relys on peak line voltage. The supply presents virtually no load at all to the power line except at the crest of sine waves. You can have co
/archives//html/Amps/1997-03/msg00109.html (8,340 bytes)

33. [AMPS] Conjugate (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Mon, 10 Mar 1997 11:53:36 -0500
They have purged Maxwell's correct work based on Bruene's incorrect measurements. Bruene's measurements used a direction coupler that gave him no idea what the source impedance was. He just "guessed"
/archives//html/Amps/1997-03/msg00110.html (8,860 bytes)

34. [AMPS] SB-220 switch (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Tue, 11 Mar 1997 21:00:20 -0500
That's not completely accurate. The Ameritron switch has 30 degree indexing, but it has different contact layout that increases voltage breakdown considerably over the Heathkit switch (and Dentron sw
/archives//html/Amps/1997-03/msg00130.html (8,527 bytes)

35. [AMPS] Choke resonance (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Wed, 12 Mar 1997 08:01:41 -0500
One way to test a choke (lacking measuring equipment) is to use a T connector (or a simple splice) to access the line from your rig on the on a way to a standard dummy load. Ground the shield to the
/archives//html/Amps/1997-03/msg00134.html (7,969 bytes)

36. [AMPS] Alpha 77DX Bias Switching (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Thu, 13 Mar 1997 16:51:34 -0500
Hi Marv, One major problem with that circuit, and circuits that copied the ETO design (published in QST and other publications)is that the pull the bias up to a high voltage. That does absolutely not
/archives//html/Amps/1997-03/msg00146.html (8,500 bytes)

37. [AMPS] voltage sag (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Sat, 15 Mar 1997 08:40:17 -0500
I am not completely sure what that statement was intended to say. The "peak voltage" and "peak current" absolutely does contribute to the power dissipated in a system, and the voltage instability of
/archives//html/Amps/1997-03/msg00152.html (10,050 bytes)

38. [AMPS] ARRL Handbook (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Sun, 16 Mar 1997 09:27:07 -0500
I just looked at the 95 Handbook and was disappointed to see several mistakes in the HV power supply section. One of the most glaring is they fail to discuss ESR, even though they show it as a resist
/archives//html/Amps/1997-03/msg00158.html (7,458 bytes)

39. [AMPS] Power supplies (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Sun, 16 Mar 1997 19:35:21 -0500
before, my only specs. Now world? wind a Maybe I haven't mentioned this in a way that makes sense, and that's why it gets ignored. But the fact remains..... YOU CAN NOT measure the line voltage with
/archives//html/Amps/1997-03/msg00163.html (10,322 bytes)

40. [AMPS] voltage drop agn (score: 1)
Author: w8jitom@worldnet.att.net (Tom Rauch (W8JI))
Date: Mon, 17 Mar 1997 09:06:04 -0500
The supply drop can not be measured with a RMS meter. Since the current load is only during peaks, he must use a peak reading meter with the same time constant as the power supply when under full loa
/archives//html/Amps/1997-03/msg00166.html (11,058 bytes)

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