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Re: Repeater equipment for sale
Matt Call me when you can about this. Kory W4RZ
By Kory Oldham W4RZ · #214780 ·
Re: Astron RM-50M conversion
Interesting consideration... We could implement as two isolated power sources... "diode OR" ?? Basically... Supply ---> diode ---> Load Charger ---> Battery ---> LVD ---> diode ---> Load The
By Jim Aspinwall · #214779 ·
Repeater equipment for sale
The Columbus (GA) Amateur Radio Club has a few fully functioning repeater items for sale.? Please check them out!? You can reply directly to me at *kk4cps@...* Motorola MSF5000 VHF 75w
By Matthew King - AK4MK · #214778 ·
Re: Astron RM-50M conversion
We, and the chargers I am aware of, don't force the battery current draw at any given state of the battery or phase of the BMS.? ie, not constant current. - BattleBorn and Renogy both indicated the
By Jim Aspinwall · #214777 ·
Re: PD526 Duplexer Tuning
At 4/24/2025 08:14 AM, you wrote: Pads can be helpful on the generate side of a VNA providing a good resistive match to the device under test. Many years ago working at Hughes Aircraft we
By Bob Dengler · #214776 ·
Re: PD526 Duplexer Tuning
Will a pad give the nanovna more of a dynamic range to see the notch depth? Iirc the dynamic range of a standard nvna is about 60 to 80db. So if I put a 10 or 15db pad that should help with tuning
By Part 15 Engineer · #214775 ·
Re: Astron RM-50M conversion
I have not used the Astron supply in many years. Switched to a GE mastr ll repeater with power supply.? We had problems with the Astron going in to crowbar protection when the power would flicker
By Ralph Mowery · #214774 ·
Re: PD526 Duplexer Tuning
Pads can be helpful on the generate side of a VNA providing a good resistive match to the device under test. Many years ago working at Hughes Aircraft we always terminated our generate cables with a
By Mike · #214773 ·
Re: Astron RM-50M conversion
Thanks Ralph, This has been my concern lately, we have had several power "flashes" while storm repairs have been in progress. The one I bought is on Amazon made by Omron (another good brand I have
By Kory Oldham W4RZ · #214772 ·
Re: Astron RM-50M conversion
It was a standard plug in time delay relay made by Allen Bradly.? Has a knob on the top of it that let you set the time to pull in after the line voltage came back.? That is the relay has its own
By Ralph Mowery · #214771 ·
Re: Astron RM-50M conversion
Ralph, This is the same setup we use minus the timer, which is something I have thought about adding in. Obviously yours works, so if you don't mind which timer did you go with? Kory
By Kory Oldham W4RZ · #214770 ·
Re: PD526 Duplexer Tuning
Check that the center pins of all your connectors on the cables are at the correct height. Also give a wiggle to the connectors at the cavity to see if your readings change significantly. I've had a
By DCFluX · #214769 ·
Re: Astron RM-50M conversion
I used the simple way of having a relay that operated on the incoming line voltage and put either the power supply or battery to the equipment.? the relay was pulled in when we had line voltage and
By Ralph Mowery · #214768 ·
THREAT TO 222-225MHz Spectrum power point presentation for 220 Spectrum Management Association (Southern California) coming your way.
If you think this only affects Southern California please view the attached Power Point that will be presented during our Quarterly Zoom Meeting for our Coordination Group, the company causing harmful
By John N. Hudson III · #214767 ·
Re: Astron RM-50M conversion
And I am wholeheartedly *against* the use of ¡°battery-specific chargers¡± except when they are used to standalone charge a battery with no load. The moment you put a load across the battery,
By Matthew Kaufman · #214766 ·
Re: MFJ1112 DC power strip
If he doesn't take it, I'm interested. Butch Bussen WA0VJR butchb@... irlp 7135 allstar 56023 echolink 790800
By Butch-tiny puppy · #214765 ·
MFJ1112 DC power strip
Good evening all, about a week ago or maybe a little more I listed on here that I had a DC power bus for sale, it was the MFJ 1112 with six pairs of binding posts. That one has been sold, but another
By Chad Nelson · #214764 ·
Re: UHF 420MHZ Micor Mobile no pl encode
This is a mobile exciter. Hang a scope on the encoder output pin and see if there is anything there when transmitting.
By Kevin Magloughlin · #214763 ·
Re: UHF 420MHZ Micor Mobile no pl encode
Jeff yes this is the one with the least amount of pins WZ5TX David ¡°Tyler¡± Bufkin ________________________________ Sent: Wednesday, April 23, 2025 1:56:23 PM To: [email protected]
By Tyler- WZ5TX · #214762 ·
Re: Astron RM-50M conversion
Jim, This is bad info, even BioEno says to not use more the 20amps when charging their 100Ah batteries. The trick to LifePo4 BMS's is to have the voltage above 14.6V to start the charging (kick it
By Kory Oldham W4RZ · #214761 ·