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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+FW\:\s+AMERITRON\s+AL\-1500\s+\?\?\?\?\s*$/: 17 ]

Total 17 documents matching your query.

1. [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Jose M. Valdes R. YV5LIX" <yv5lix@cantv.net>
Date: Sun, 7 Aug 2005 13:41:29 -0000
Hello all, I'm getting ready for next winter 160 meters season and in the process I'm upgrading the station, to starters I bough a Yaesu FT-1000MP MARK-V with SSB and CW INRAD optional filters and IN
/archives//html/Amps/2005-08/msg00236.html (7,286 bytes)

2. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 7 Aug 2005 09:01:26 -0700
Jos&eacute; -- The Al-1500 is the only manufactured HF 8877 amplifier on this planet that has no parasite suppressor. My free advice is that this is not is not good engineering practice. - On the Eas
/archives//html/Amps/2005-08/msg00240.html (8,897 bytes)

3. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Joe Subich, W4TV" <k4ik@subich.com>
Date: Sun, 7 Aug 2005 12:57:55 -0400
Jose, The AL-1500 has a slightly undersize output circuit and may melt the coil if you try to run "full soup" on RTTY. Other than that - as you have noticed - it is a relatively good value for the mo
/archives//html/Amps/2005-08/msg00243.html (10,152 bytes)

4. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 7 Aug 2005 10:40:19 -0700
8877 screen? Autopsy photo of kaput Eimac 8877 s/n HSZ 501 removed from AL-1500: http://www.somis.org/8877-gs2.JPEG Call for reference. - In its early 8877 spec sheet, Eimac recommends not exceeding
/archives//html/Amps/2005-08/msg00245.html (11,283 bytes)

5. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Scott Manthe" <n9aa@arrl.net>
Date: Sun, 7 Aug 2005 13:23:49 -0500
The AL-1500 is what I decided to buy after a similar search. I've come to the conclusion that it is a very good value for the money. It'll easily put out over 2kW, so you have plenty of headroom and
/archives//html/Amps/2005-08/msg00249.html (8,095 bytes)

6. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Joe Subich, W4TV" <k4ik@subich.com>
Date: Sun, 7 Aug 2005 15:31:58 -0400
Slip of the fingers ... If the grid is capable of safely handling 350 mA, why does Eimac say 74 mA single tone and 25 mA two tone grid current at 3500 Vp? Why do they say 10 mA with 2500 Vp at 220 M
/archives//html/Amps/2005-08/msg00252.html (9,379 bytes)

7. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 7 Aug 2005 14:56:07 -0700
Chortle. A finger slip off of the G key might produce an F or T or Y or H or B or a V, but an S seems like a bit of a Stretch. Because that the grid-I under "Typical Operation", Joe. . Please identif
/archives//html/Amps/2005-08/msg00257.html (10,506 bytes)

8. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "John Vickers" <wa4tt@nlamerica.com>
Date: Sun, 7 Aug 2005 19:01:38 -0400
Jose, Beware-- free advice may be worth just what you pay for it. I've been using a AL 1200 converted to an 8877 for several years. It has no parasitic suppressor and has performed fine. In fact the
/archives//html/Amps/2005-08/msg00262.html (8,529 bytes)

9. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Sun, 7 Aug 2005 19:32:17 -0700
Rich, You are making an apples to oranges comparison. The issue isn't the current carrying capability of the 8877 grid, it is the power dissipation of the grid. A capacitor has a power factor of ~0.0
/archives//html/Amps/2005-08/msg00268.html (8,733 bytes)

10. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 7 Aug 2005 20:15:13 -0700
The grid has ESR. Current through R causes dissipation. Au has c. 60% of the conductance of Cu or Ag. Just because the grid has C does that mean there is no P dissipation in the grid? Richard L. Meas
/archives//html/Amps/2005-08/msg00271.html (9,148 bytes)

11. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Sun, 7 Aug 2005 20:47:06 -0700
Yes, of course, Rich, but the ESR is not what is entirely responsible for grid dissipipation due to grid current flowing under conditions of excessive drive. If it were, the grid drive voltage term w
/archives//html/Amps/2005-08/msg00272.html (9,904 bytes)

12. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 7 Aug 2005 20:59:09 -0700
It's not thin wire, it's rectangular bar stock and there are 108 segments - each of which appear to have the surface area of approx. For the anode, the velocity of electrons is great, but for the gri
/archives//html/Amps/2005-08/msg00273.html (10,990 bytes)

13. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Michael Tope" <W4EF@dellroy.com>
Date: Sun, 7 Aug 2005 21:16:05 -0700
Well....yes..... but the argument is still the same. And if grid dissipation were a function simply of conductor ESR, why would even 350mA let alone 100mA be a big deal for a #16 AWG equivalent condu
/archives//html/Amps/2005-08/msg00274.html (10,190 bytes)

14. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: "Jose M. Valdes R. YV5LIX" <yv5lix@cantv.net>
Date: Mon, 8 Aug 2005 12:20:19 -0000
Hello, Thanks for all the answers and technical explanations regarding the pros and cons of the Ameritron AL-1500, I never expected such response to my mail, the true meaning of what amateur radio co
/archives//html/Amps/2005-08/msg00284.html (8,577 bytes)

15. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: R.Measures <r@somis.org>
Date: Mon, 8 Aug 2005 06:50:08 -0700
As I recall, Eimac says grid dissipation in watts is approximately equal to DC grid-I multiplied by rms grid to cathode potential. Apparently, electrons that strike the grid are not going all that fa
/archives//html/Amps/2005-08/msg00288.html (10,748 bytes)

16. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: R.Measures <r@somis.org>
Date: Mon, 8 Aug 2005 07:16:50 -0700
Parasites have been a torrid topic since the October, 1988 issue of *QST* came out. To me, an interesting aspect of the debate is that apparently no one who denies that parasites are possible has tak
/archives//html/Amps/2005-08/msg00289.html (9,803 bytes)

17. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Mon, 8 Aug 2005 08:54:32 -0700 (GMT-07:00)
"To me, an interesting aspect of the debate is that apparently no one who denies that parasites are possible has taken a college-level course in Alternating Current Circuit Analysis." Response: Rich,
/archives//html/Amps/2005-08/msg00293.html (9,207 bytes)

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