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References: [ +from:ka4inm@tampabay.rr.com: 211 ]

Total 211 documents matching your query.

1. Re: [Amps] HV transformer, HV resistor , HV diode, 8877 and 4Cx250B socket socket, RCA 8122 (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Wed, 29 Apr 2009 00:32:47 +0000
FYI, you can buy `power supplies' for use in Hi-Potters, 120 Volts ac in 10/20/30 kV out all sealed in a can. Check Allied, Newark and etc., at one time one or both sold them. -- Ron KA4INM - Surpris
/archives//html/Amps/2009-04/msg00393.html (9,879 bytes)

2. Re: [Amps] Doorknob Caps Needed: Background (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 28 May 2009 08:56:45 -0400
The capacitor must have sufficient current carrying ability and DC Voltage hold off ability and a low enough impedance (compared to the impedance of the tube/s and the input of the output network) t
/archives//html/Amps/2009-05/msg00240.html (8,113 bytes)

3. Re: [Amps] Meter shunt (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Fri, 29 May 2009 13:03:12 -0400
Usually, but not always, meter cards (scale) will indicate the meter movement sensitivity in the lowest right hand location on the card, normally in a hard to see location. Like a 10 mA scale might
/archives//html/Amps/2009-05/msg00257.html (7,819 bytes)

4. Re: [Amps] Grounded Grid (Screen) 4CX250B power gain (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 23 Jul 2009 12:52:16 -0400
That should be do-able by using a hot carrier or amplified RF level sensor at the input of the tube/s to develop the ALC signal. -- Ron KA4INM - I'm proud to be Chuck's pop! ________________________
/archives//html/Amps/2009-07/msg00308.html (10,085 bytes)

5. Re: [Amps] grounding grids (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 30 Jul 2009 10:31:13 -0400
One factor with GG is most of the drive is added to the power from the amplifier and is perhaps like adding some pure signal to the mixture of signal and distortion from the amplifier. -- Ron KA4INM
/archives//html/Amps/2009-07/msg00399.html (9,240 bytes)

6. [Amps] Design VS parasitic (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Mon, 24 Aug 2009 23:44:11 +0000
That's why I love the idea of using large wire wound resistors as the coil, the nichrome is "factory welded." I shall try to obtain current carrying capacity ratings of proposed resistors for my pro
/archives//html/Amps/2009-08/msg00475.html (8,676 bytes)

7. [Amps] GG amplifier input impedance (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Wed, 26 Aug 2009 15:09:46 -0400
I wouldn't be so quick to say that. Nothing is that simple. The load on a grounded grid amplifier is seen by the amplifier's driver. (I assume as long as the GG amplifier is drawing plate current) A
/archives//html/Amps/2009-08/msg00508.html (8,858 bytes)

8. Re: [Amps] GG amplifier input impedance (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 27 Aug 2009 00:50:55 +0000
We aren't confused, obviously he didn't tell us what he was thinking about, just like my XYL (wife) 90% of the time. -- Ron KA4INM - The problem with socialism is that eventually you run out of othe
/archives//html/Amps/2009-08/msg00525.html (9,823 bytes)

9. Re: [Amps] Not the Diacrode (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Fri, 28 Aug 2009 11:52:51 -0400
Filaments can just as easily be ramped up on ac, this way with no fuss. I have seen ferro-resonant regulator feeding the filament transformer, the size was carefully chosen so the low resistance of
/archives//html/Amps/2009-08/msg00577.html (7,934 bytes)

10. Re: [Amps] Dimished Tube Life (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Fri, 25 Sep 2009 10:06:37 -0400
It is an answer from an engineer's mind that is complete correct and both provable and a "given." Nothing wears out things with more certainty that using them. If you don't understand this, read mor
/archives//html/Amps/2009-09/msg00311.html (9,170 bytes)

11. Re: [Amps] Suggestion..... (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sat, 03 Oct 2009 21:40:19 +0000
I can recommend adding "amps" to your address book, then you only need highlight the senders address and type your abbreviation for amps. (which could be "a" or "am" or whatever you wish) Just as I
/archives//html/Amps/2009-10/msg00052.html (7,862 bytes)

12. Re: [Amps] filament voltage (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Mon, 05 Oct 2009 22:50:23 +0000
The way I understand it, RMS is the a.c. Voltage that is the equivalent heating capability to the direct current Voltage, So. 10 Volts RMS will heat a filament to the same temperature as 10.0 Volts
/archives//html/Amps/2009-10/msg00114.html (7,722 bytes)

13. Re: [Amps] cca am-1000d (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Mon, 05 Oct 2009 22:52:56 +0000
I didn't think a CCA transmitter was the same as a continental transmitter. -- Ron KA4INM - Remember, the government cannot give anything to anyone that they have not first taken away from someone e
/archives//html/Amps/2009-10/msg00115.html (7,130 bytes)

14. Re: [Amps] TL922 Power Plugs (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 05 Nov 2009 02:49:39 +0000
We had one put in the bed room circuit at our farm house when we had the place re-wired last summer. Every time lightning strikes within 5 miles, the $21 breaker goes open. Lovely! -- Ron KA4INM - R
/archives//html/Amps/2009-11/msg00057.html (9,230 bytes)

15. Re: [Amps] PSU design question (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sat, 07 Nov 2009 12:46:14 +0000
I have never seen this and I do not understand a reason for this practice with one exception, that being where a tube element is grounded and that element needs monitored and protected, such as a kl
/archives//html/Amps/2009-11/msg00100.html (8,658 bytes)

16. Re: [Amps] B- questions (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sun, 08 Nov 2009 12:44:01 +0000
I don't see why hot carrier power diodes can't be used as Ammeter protection, I don't know how much they cost or if they are found at HAMfests. The typical 35 Volt piV rating is irrelevant in this a
/archives//html/Amps/2009-11/msg00121.html (8,145 bytes)

17. Re: [Amps] FW: B- questions (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Wed, 11 Nov 2009 03:15:09 +0000
I don't know the amp, but I do have a copy of the IB (I collect such things) and yes. -- Ron KA4INM - Remember, the government cannot give anything to anyone that they have not first taken away from
/archives//html/Amps/2009-11/msg00170.html (7,939 bytes)

18. Re: [Amps] pcb/breadboard input output wiring methods/accessories (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Mon, 16 Nov 2009 09:28:37 -0500
You didn't mention Voltage or current but if either aren't too high you can use ribbon wire and the kind of connectors used on PATA hard drives. If either (E or I) are on the high side you could use
/archives//html/Amps/2009-11/msg00189.html (7,412 bytes)

19. Re: [Amps] High Voltage wire (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Wed, 02 Dec 2009 16:58:20 -0500
Ordinary RG-8/U is rated at something like 5,000 volts, but my hi-potter uses it as it's negative lead and it with stands (with no leakage, compared to the corona) about 55,000 Volts, I'm guessing a
/archives//html/Amps/2009-12/msg00046.html (9,039 bytes)

20. Re: [Amps] power meters for HF/VHF (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Wed, 02 Dec 2009 23:22:59 +0000
Mine went to 100 Ohms so I opened it to find a good resistor and fractured clamping straps, everything made of that material. I gave up on it. -- Ron KA4INM - The only real problem is death is so fi
/archives//html/Amps/2009-12/msg00049.html (7,125 bytes)

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