Search String: Display: Description: Sort:

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TenTec\]\s+Herc\s+II\s+vs\s+Astron\s*$/: 18 ]

Total 18 documents matching your query.

1. [TenTec] Herc II vs Astron (score: 1)
Author: "Tom Macon" <tmacon@wi.rr.com>
Date: Sun, 3 Mar 2013 11:19:06 -0600
Hi, all - I have replaced the four supplies in the 9420 beast with four Astron SS-25's. At first all seemed well but then I experienced reduced power out from the 420 Herc. Upon investigation, it see
/archives//html/TenTec/2013-03/msg00021.html (7,970 bytes)

2. Re: [TenTec] Herc II vs Astron (score: 1)
Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
Date: Sun, 3 Mar 2013 11:28:42 -0600
You will likely need to add blocking diodes in the output line of each supply. Then you will need to raise the voltage of each supply to offset the drop of the diodes. Be sure the leads from each sup
/archives//html/TenTec/2013-03/msg00022.html (9,747 bytes)

3. Re: [TenTec] Herc II vs Astron (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Sun, 3 Mar 2013 18:36:14 +0100
You might try feeding each power supply through a large diode. It would cause a slight loss in power, but might isolate the 4 power supplies from each other. 73 Rick, DJ0IP Hi, all - I have replaced
/archives//html/TenTec/2013-03/msg00023.html (8,322 bytes)

4. Re: [TenTec] Herc II vs Astron (score: 1)
Author: bob barnes <k0wtz@yahoo.com>
Date: Sun, 3 Mar 2013 11:12:37 -0800 (PST)
i found a used ameritron 70 amp power supply more than enough and im running the omni 6 with it!!   bob k0tz all things are possible in Christ Jesus our savior You will likely need to add blocking di
/archives//html/TenTec/2013-03/msg00024.html (10,435 bytes)

5. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Ken Brown <ken.d.brown@hawaiiantel.net>
Date: Sun, 03 Mar 2013 09:35:56 -1000
Upon investigation, it seems that one or more of the Astrons shuts down so not all four sections of the amp are powered. I see that, if I turn off one supply, that there is backfeed from the amp show
/archives//html/TenTec/2013-03/msg00025.html (10,474 bytes)

6. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Richards <jruing@ameritech.net>
Date: Sun, 03 Mar 2013 15:06:20 -0500
Er... um... 70 amps... yeah, that should do it. __________________ K8JHR _____________ i found a used ameritron 70 amp power supply more than enough ______________________________________ ___________
/archives//html/TenTec/2013-03/msg00029.html (7,970 bytes)

7. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Steve Hunt <steve@karinya.net>
Date: Sun, 03 Mar 2013 21:07:55 +0000
N6KB beat me to it! My schematics show nowhere the 4 supplies are connected together; but you do need a fifth, low current, supply to power the DC distribution board in the amplifier. In the 9420 the
/archives//html/TenTec/2013-03/msg00031.html (8,096 bytes)

8. Re: [TenTec] Herc II vs Astron (score: 1)
Author: "Tom Macon" <tmacon@wi.rr.com>
Date: Sun, 3 Mar 2013 16:10:34 -0600
Looking at the 420 schematics, it seems the backfeed must come through the dump resistors. If one ps is on with the other 3 off, the backfeed voltage shows up on just one supply output - the other 2
/archives//html/TenTec/2013-03/msg00032.html (11,480 bytes)

9. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Jim Brown <k9yc@audiosystemsgroup.com>
Date: Sun, 03 Mar 2013 14:14:35 -0800
In my experience, 70A is NOT enough. I've run my Herc II from TWO Astron 70A linear supplies, each connected to half of the output stages, and with their regulator references tied together. That work
/archives//html/TenTec/2013-03/msg00033.html (8,319 bytes)

10. Re: [TenTec] Herc II vs Astron (score: 1)
Author: bob barnes <k0wtz@yahoo.com>
Date: Sun, 3 Mar 2013 15:30:12 -0800 (PST)
thats funny my 70amp switching power supply works just fine.  i had my doubts when i bought it but i bought it used and can always get my money out of it.  i have my omni 6 and the herk 2 both hooked
/archives//html/TenTec/2013-03/msg00034.html (9,052 bytes)

11. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Richards <jruing@ameritech.net>
Date: Sun, 03 Mar 2013 21:08:50 -0500
My bad. I am sorry... I got corn fused and thought this was in another, more general thread about power supplies... Duh... sorry... ya can all disregard my take cause I don't know enough about the He
/archives//html/TenTec/2013-03/msg00035.html (9,115 bytes)

12. Re: [TenTec] Herc II vs Astron (score: 1)
Author: bob barnes <k0wtz@yahoo.com>
Date: Mon, 4 Mar 2013 05:11:16 -0800 (PST)
no problem her makes life interesting!!!     bob all things are possible in Christ Jesus our savior My bad.   I am sorry... I got corn fused and thought this was in another, more general thread about
/archives//html/TenTec/2013-03/msg00036.html (9,439 bytes)

13. Re: [TenTec] Herc II vs Astron (score: 1)
Author: "John/K4WJ" <k4wj@att.net>
Date: Mon, 4 Mar 2013 10:32:25 -0500
Bob, Isn't SWR determined by the match between the feedline and the load and not by resonance? I believe source amperage goes up when the impedance of the load is lower than the source. Please correc
/archives//html/TenTec/2013-03/msg00037.html (10,358 bytes)

14. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Jim Brown <k9yc@audiosystemsgroup.com>
Date: Mon, 04 Mar 2013 09:30:35 -0800
Right. LOSS in the line is determined by the match between the antenna and the line. My observation about a 70A Astron supply being insufficient is based on presenting a matched load to my Herc II us
/archives//html/TenTec/2013-03/msg00040.html (9,170 bytes)

15. Re: [TenTec] Herc II vs Astron (score: 1)
Author: bob barnes <k0wtz@yahoo.com>
Date: Mon, 4 Mar 2013 12:00:35 -0800 (PST)
did a check of my ameritron this am with the omni 6 running 50 watts and the herk 2 at 500 watts out still not into fault and the needle not even hitting the red yet on the amp meter of the p/s but i
/archives//html/TenTec/2013-03/msg00042.html (10,225 bytes)

16. Re: [TenTec] Herc II vs Astron (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Mon, 4 Mar 2013 21:39:58 +0100
Bob, you did not tell us what antenna matchbox you are using. If it is a model 238, they you are correct, it should be OK. BUT if it is a T-Network tuner, then it is easily possible to have a good SW
/archives//html/TenTec/2013-03/msg00043.html (10,952 bytes)

17. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Stuart Rohre <rohre@arlut.utexas.edu>
Date: Tue, 05 Mar 2013 17:17:46 -0600
Usually you need current equalizing resistors to run power supplies in parallel. If that is what you are doing. Otherwise one Astron may have its regulator set differently from the others. Stuart K5K
/archives//html/TenTec/2013-03/msg00049.html (8,403 bytes)

18. Re: [TenTec] Herc II vs Astron (score: 1)
Author: Stuart Rohre <rohre@arlut.utexas.edu>
Date: Tue, 05 Mar 2013 17:20:03 -0600
In using multiple Astron supplies, you should bypass the output of EACH with ceramic disk cap to avoid RF pickup, a known problem of even a single Astron. Something like a 0.01 should work for HF. -S
/archives//html/TenTec/2013-03/msg00050.html (8,979 bytes)

Current List: 1 - 18
Page: [1]
This search system is powered by Namazu