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Total 21 documents matching your query.

1. [AMPS] DSP & and other curiosities (score: 1)
Author: (Steve Iezzi)
Date: Wed, 17 Jan 2001 21:07:52 -0500
I usually differentiate the two filter realizations as "continuous" or "discrete" time rather than analog or digital. Common filters implemented with op amps or LC networks are continuous time filter
/archives//html/Amps/2001-01/msg00439.html (11,002 bytes)

2. [AMPS] HV Fusing / Diode Protection (score: 1)
Author: (Steve Iezzi)
Date: Mon, 12 Jun 2000 10:59:32 -0400
I have used the Metal Oxide resistors available in Digi-Key (Panasonic and Yageo) for the same purpose. They are flame retardant and handle high surge currents. 0.82 ohms is listed as a stock value i
/archives//html/Amps/2000-06/msg00107.html (8,437 bytes)

3. [AMPS] 12VDC Power supply for Hercules II (score: 1)
Author: (Steve Iezzi)
Date: Fri, 28 Apr 2000 18:21:07 -0400
Switching supplies are used in industrial/commercial applications that rival amplifier service and would easily meet the requirements for the Hercules and weigh in at less than half of the comparable
/archives//html/Amps/2000-04/msg00188.html (7,400 bytes)

4. [AMPS] Network analysis of suppressors (score: 1)
Author: (Steve Iezzi)
Date: Wed, 1 Mar 2000 16:04:44 -0500
It just so happens that I was building new suppressors for a Clipperton that I am returning to service and the parasitic topic comes up again. Since I have access to some very nice equipment, I can b
/archives//html/Amps/2000-03/msg00014.html (10,679 bytes)

5. [AMPS] Network analysis of suppressors (score: 1)
Author: (Steve Iezzi)
Date: Thu, 2 Mar 2000 09:29:44 -0500
S21 for this network is 46 + j74 at 50 MHz. The goal was to dissipate about 1 to 2 watts per suppressor at 29 MHz. 572B tubes have significant feedback capacitance and this particular amp arced and
/archives//html/Amps/2000-03/msg00042.html (16,882 bytes)

6. [AMPS] Can't get rid of the boom,boom,boom... (score: 1)
Author: (Steve Iezzi)
Date: Mon, 6 Mar 2000 09:37:08 -0500
I just installed Harbach suppressors in a 922. The original was 2 1/2 turns in parallel with 24 ohms. Al's suppressor consists of 5 turns of nichrome and two 100 ohm 3 watt Matsushita resistors. The
/archives//html/Amps/2000-03/msg00238.html (7,626 bytes)

7. [AMPS] Typical Bias for a 3-500Z (score: 1)
Author: (Steve Iezzi)
Date: Mon, 6 Mar 2000 14:39:19 -0500
What is the typical bias current requirement for a 3-500Z in AB2 with 3100 volts of plate current for quality SSB operation. I heard numbers ranging from 50 mA to as high as 125 mA. What is the typic
/archives//html/Amps/2000-03/msg00259.html (6,917 bytes)

8. [AMPS] Input Adjustments on TL-922 (score: 1)
Author: (Steve Iezzi)
Date: Tue, 22 Feb 2000 15:09:32 -0500
The input match adjustments on the 922 are nestled amidst the output filter and would require some rather delicate handling of the tweaker.... Any suggestions for safely adjusting these coils. Thanks
/archives//html/Amps/2000-02/msg00504.html (6,752 bytes)

9. [AMPS] Fusing the 110 volt supply (score: 1)
Author: (Steve Iezzi)
Date: Mon, 28 Feb 2000 10:48:06 -0500
Hi All, Just finished with the mods for a TL-922 and thought I would pass along a tip. Raychem now has 250 volt poly fuses in several usable values. These are self resetting thermal fuses that are co
/archives//html/Amps/2000-02/msg00631.html (7,110 bytes)

10. [AMPS] your sb-220 mod (score: 1)
Author: (Steve Iezzi)
Date: Wed, 19 Jan 2000 10:05:00 -0500
I had similar problems with 40 meters when I ran a station on the second floor of the house. It appeared that the length of the ground was resonant or near resonant on 40 meters causing RF to get int
/archives//html/Amps/2000-01/msg00422.html (7,164 bytes)

11. [AMPS] need dentron clipperton L transformer (score: 1)
Author: (Steve Iezzi)
Date: Thu, 18 Nov 1999 14:15:06 -0500
I have the Peter Dahl drop-in replacement. It works very well. DENTRON CLIPPERTON-L POWER TRANSFORMER EI-162 X 3.5 02 24 $185.00 PR) 117/234 VAC 60 HZ 1PH S1) 0-640-1010 VAC @
/archives//html/Amps/1999-11/msg00393.html (7,434 bytes)

12. [AMPS] Dentron Clipperton L Conservative Loading? (score: 1)
Author: (Steve Iezzi)
Date: Tue, 28 Sep 1999 10:40:17 -0400
I have an L in pretty good condition that I've been using as an experimentation amplifier with an eye toward eventually building my own. I've spent quite a few hours with it so here's my two cents...
/archives//html/Amps/1999-09/msg00276.html (10,330 bytes)

13. [AMPS] Clipperton L on 10 Meters (score: 1)
Author: (Steve Iezzi)
Date: Mon, 2 Aug 1999 11:48:29 -0400
Has anyone had any success operating the Clipperton L on 10 meters. There's a switch position for the band but the amp tends to run away when I tune it up. Thanks in advance for the help. Steve Iezzi
/archives//html/Amps/1999-08/msg00027.html (7,820 bytes)

14. [AMPS] Clipperton L on 10 Meters (score: 1)
Author: (Steve Iezzi)
Date: Mon, 2 Aug 1999 14:17:42 -0400
How would go about designing and testing a neutralization circuit. This seems like an interesting project... Thanks again, Steve -- FAQ on WWW: Submissions: amp
/archives//html/Amps/1999-08/msg00041.html (8,552 bytes)

15. [AMPS] Looking for a Dentron 572B (score: 1)
Author: (Steve Iezzi)
Date: Thu, 1 Jul 1999 16:47:15 -0400
One of the four 572Bs in my Clipperton appears to have failed. Would anyone be willing to part with a Dentron tube pull or something with similar bias characteristics. Thanks in advance, Steve KT4FY
/archives//html/Amps/1999-07/msg00008.html (6,763 bytes)

16. [AMPS] Penta 572B Tubes (score: 1)
Author: (Steve Iezzi)
Date: Tue, 27 Jul 1999 14:44:54 -0400
Tubeworld has some NOS Chinese made 572B tubes dated 1991 and branded under the Penta Labs label. Does anyone have any experience with this tube? Would these operate in older amplifiers (i.e. FL2100
/archives//html/Amps/1999-07/msg00540.html (6,854 bytes)

17. [AMPS] Tuned Input Circuit for Clipperton L (score: 1)
Author: (Steve Iezzi)
Date: Wed, 10 Mar 1999 15:07:59 -0500
I'm building a tuned input circuit for an older Clipperton L. Does anybody have some starting values for the pi networks for the various bands. Thanks in advance, Steve Iezzi KT4FY -- FAQ on WWW: htt
/archives//html/Amps/1999-03/msg00219.html (6,998 bytes)

18. [AMPS] Re: Tuned Input for Clipperton (score: 1)
Author: (Steve Iezzi)
Date: Thu, 11 Mar 1999 16:38:48 -0500
Any problem using 500 volt ceramic disc caps for the larger values and silver mica for the smaller ones. Steve KT4FY -- FAQ on WWW: Submissions: amps@contesting.
/archives//html/Amps/1999-03/msg00239.html (8,976 bytes)

19. [AMPS] HV Switching Supply (score: 1)
Author: (Steve Iezzi)
Date: Mon, 1 Feb 1999 13:26:05 -0500
capacity in the needs to My impression from the original post was that this would be an open loop switching supply. A typical low loss forward converter would give reasonable (5 to 10 %) performance
/archives//html/Amps/1999-02/msg00028.html (8,106 bytes)

20. [AMPS] File Compacting (score: 1)
Author: (Steve Iezzi)
Date: Mon, 1 Feb 1999 16:59:03 -0500
Outlook Express saves mail in a single file as a linked list. When a message is deleted, it's marked as such in the list but still remains in the file in some form. When you compact the folder, the
/archives//html/Amps/1999-02/msg00040.html (8,079 bytes)

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