Hello All,
I heard something interesting earlier today while monitoring an AO-7 pass above my QTH at around 23:30Z. The mode B (U/V) transponder basically went dead, and I heard a very odd buzzing sound in about the centre of the passband, with no activity anywhere else in the passband. Not a typical FMing sound, but something more akin to auroral buzzing, like on 6 metres. We have had some great visible auroral shows at my latitude lately (57 degrees north), and I wonder if the solar wind causing the aurora may have had an effect on old AO-7. Did anyone else hear this? Any thoughts on what was happening? I see from the live Oscar update web page that Russian Hams reported normal mode B operation subsequent to my observations.
As an aside, after repair of an intermittent in the UHF finals of my ICOM 820H and replacement of the N connector, I am fully QRV again on the birds, and look forward to giving out grid DO16 when able.
73 to all,
Randy, VE6RGU
Good morning all and 73/
I know this is a bit off topic (maybe way off topic) but I'm sure that many of you regularly use UHF. I have been looking for a source of a UHF LINEAR amplifier but they seem to be extremely difficult to find. I can find repeater amps and ATV amps (FM) but haven't been able to find any that specify that they are linear. I'm not looking for legal limit just 100-200watts. Any help would be appreciated.
Kevin, WB5RUE Grid-EL09vf Eagle Creek Observatory http://www.eaglecreekobservatory.org I'd be unstoppable if it weren't for law enforcement and physics
One source I am aware of is RM Italy. Here is a link to a unit that might suit your needs:
http://www.rmitaly.com/scheda.asp?IDGr=1&cat=10&tipo=117
73, Randy
On 15/11/2012 7:56 AM, Kevin Muenzler, WB5RUE wrote:
Good morning all and 73/
I know this is a bit off topic (maybe way off topic) but I'm sure that many of you regularly use UHF. I have been looking for a source of a UHF LINEAR amplifier but they seem to be extremely difficult to find. I can find repeater amps and ATV amps (FM) but haven't been able to find any that specify that they are linear. I'm not looking for legal limit just 100-200watts. Any help would be appreciated.
Kevin, WB5RUE Grid-EL09vf Eagle Creek Observatory http://www.eaglecreekobservatory.org I'd be unstoppable if it weren't for law enforcement and physics
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
There is also TE Systems http://tesystems.com/am-radio.htm
Dave-KB1PVH
Sent from my Verizon Wireless Droid RAZR
Hi Kevin,
TE systems 4452G
73, Tony AA2TX ---
On 11/15/2012 9:56 AM, Kevin Muenzler, WB5RUE wrote:
Good morning all and 73/
I know this is a bit off topic (maybe way off topic) but I'm sure that many of you regularly use UHF. I have been looking for a source of a UHF LINEAR amplifier but they seem to be extremely difficult to find. I can find repeater amps and ATV amps (FM) but haven't been able to find any that specify that they are linear. I'm not looking for legal limit just 100-200watts. Any help would be appreciated.
Kevin, WB5RUE Grid-EL09vf Eagle Creek Observatory http://www.eaglecreekobservatory.org I'd be unstoppable if it weren't for law enforcement and physics
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
I got one. Does a good job. Jim, Ke4kol
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Anthony Monteiro Sent: Thursday, November 15, 2012 11:50 AM To: Kevin Muenzler, WB5RUE Cc: amsat-bb@amsat.org Subject: [amsat-bb] Re: OT: UHF Linear Amp source
Hi Kevin,
TE systems 4452G
73, Tony AA2TX ---
On 11/15/2012 9:56 AM, Kevin Muenzler, WB5RUE wrote:
Good morning all and 73/
I know this is a bit off topic (maybe way off topic) but I'm sure that
many
of you regularly use UHF. I have been looking for a source of a UHF
LINEAR
amplifier but they seem to be extremely difficult to find. I can find repeater amps and ATV amps (FM) but haven't been able to find any that specify that they are linear. I'm not looking for legal limit just 100-200watts. Any help would be appreciated.
Kevin, WB5RUE Grid-EL09vf Eagle Creek Observatory http://www.eaglecreekobservatory.org I'd be unstoppable if it weren't for law enforcement and physics
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Kevin:
I'm wondering if there is some other criteria besides UHF (I presume in the 430-440 MHz band) and 100-200 watts out and linear operation? Because there are many amps that meet those criteria.
If you want brand new, you can find them from Mirage (not my first choice, our repeater club and some of its members have had bad luck with workmanship and keeping them operating), TE Systems (I've heard plenty of positive feedback from folks with the exception of dealing with the company for repairs), and some others.
In the used market, I have had excellent results with RF Concepts bricks on 144, 222, and 432. If you find one on the used market, it will probably be quite satisfactory for you (I don't believe they ever made a unit that produced more than 100 watts out). Teletec amps seem to be quite rare on the used market, but that's probably because most folks that have them don't want to let go of them.
73 de W0JT EL09ro October - May EN34js May - September
On Nov 15 2012, Kevin Muenzler, WB5RUE wrote:
Good morning all and 73/
I know this is a bit off topic (maybe way off topic) but I'm sure that many of you regularly use UHF. I have been looking for a source of a UHF LINEAR amplifier but they seem to be extremely difficult to find. I can find repeater amps and ATV amps (FM) but haven't been able to find any that specify that they are linear. I'm not looking for legal limit just 100-200watts. Any help would be appreciated.
Kevin, WB5RUE Grid-EL09vf Eagle Creek Observatory http://www.eaglecreekobservatory.org I'd be unstoppable if it weren't for law enforcement and physics
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Tokyo Hi-Power has had 70cm amps in the past like the hl-120u or hl-130u http://www.tokyohypower.com/pdf/manual_hl130u.pdf I'm not sure they are still making anything in that range currently.
participants (7)
-
Anthony Monteiro -
Dave Webb KB1PVH -
Floyd Rodgers -
KE4KOL -
Kevin Muenzler, WB5RUE -
Randy Morden -
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