$5 amplifier to radio safety buffer keying relay how-to
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- Опубліковано 14 гру 2024
- $5 amp to radio buffer relay. This shows How to wire a simple cheap and effective arduino relay board from Amazon/eBay to safely control your old style HF amplifier with a modern HF radio . Works with all radios and all amplifiers. Provides opto isolation and is a $5 solution
THANK YOU! I have been looking at various sources for pre-buiilt $50 and up boxes. This is what I need. I can wire this and put it in a Bud box.
And save $45 too!! Glad it helped you. Please thumbs up and subscribe !
Watched another vid previous to this that did not explain the low/high nor explain the wiring. Thank you for providing clarification.
Thanks. Got mine working between my HL2 and Neptune 100W amp.
Thanks for the uptake JM. Good imagery and clear narration. JR
Thank You!
Note! Kenwood recommends maximum keying current less than 10mA while TX. The mentioned module consumes 12.5 mA, which is slightly higher than the recommended current. The situation will be corrected by installing a resistor of several kOhm in series to pin 7.
@@3841-o9d you can also power the module separately using external power supply that runs the radio. Simple solution. Zero risk.
@@jomf8929 Yes, of course, an external power source for the module. Powering the module from the transceiver pin means guaranteed to burn out the keys on the transistors in the transceiver! We are talking about the maximum current on pin 7, which is limited to 10 mA, i.e. for this reason, the relay windings cannot be connected to it directly. But the optocoupler of the module also consumes more current than is permissible for Kenwood.
@@3841-o9d yes. Just use a 9V battery or connect to your radio’s power supply. So simple.
Thanks very much Joe from ‘G’ land - was looking for a way to protect my 703 from the Xiegu125 to stop the magic smoke escaping - Cheers Davy
Hi. thanks. What is the advantage of using an opto coupler? If the radio already has a ptt output can it not be used to directly switch a relay to ground? I'm looking for a circuit to deactivate / switch the tx relay for a noise eliminator during tx. I was thinking a 2sc2222 with emitter to ground with a elec capacitor across it, a diode from ground to middle leg and from middle leg a small ceramic cap to sample the rf with that switches the transistor to ground causing the relay to find ground and activate..
Thanks, Joe. Very helpful.
Glad it was helpful!
Hello, do you think it would work for an icom 746?
I have problems with an amp, and I have already tried 3 different cables and none of them work, I think I will need a relay
Yes. This will work with IC746 for sure !
You could even power the relay module using the 13pin accessory socket or the auto tuner socket on the 746 if it’s not being used for something else.
@@jomf8929thanks for the answer, should I use acc2 or the alc/send jack??
Sorry for so many questions, I don't know and I don't want to damage the amplifier.
@@jaijua2348 easiest is I to use the send jack to trigger the relay . The alc jack goes directly to amplifier ALC output jack.
@@jomf8929 Thank you, I compared the module on aliexpress, and I will use the jack send to activate it as explained, I hope everything goes well, thank you very much for everything.
@@jaijua2348 message me if you get stuck. I’ll help you !
Would you know what pins on a FTDX10 would I input into the relay module?
The ftdx10 offers several options for hookup. You can use the 10 pin mini din amplifier connector or the 8 pin mini din relay connector or the 13 pin din connector or the rs232 connector It depends what other accessories you have in your station. Would need more detail on which of those 4 connectors you’ve got on hand.
@@jomf8929 I have the 8 pin and the 10 pin is about to arrive. I have a buffer relay and wish to fire the PTT on a Metron MA1000 solid state amp
@@enginedave On the 10 pin linear plug it’s the TX ground and ground pins The manual shows you. Page 13. The 8 pin tuner connector can also be used. It also uses the tx ground and ground pins. Manual page 13 shows it too. Very easy to build or buy. Just put the buffer relay between radio and amp. The metron does not need a buffer relay. It’s all low voltage so no risk to the radio anyway but you can add it for extra assurance I guess.
Thanks for the clip, I’ve purchased the same relay module to operate with an IC -7600 which preceded the 7610 so I thought would use same settings. Did you confirm the NO/NC and other settings from the 7610 manual? Also, did you use the ALC connection between amp and radio? 73s
Any HF radio is going to be a normally open (and closes to actuate the amplifier). Just set it up one way and if it doesn't key the amp, swap the jumper and it should work fine.
Yes on ALC. That's generally good amateur practice if your amp has an ALC feedback circuit. It could save your amp from damage from being over-driven.
No need for alc if your exciter has proper power output control like all modern radios have. The NO and NC can be changed using the jumper. This is novice license level easy
I just acquired a Drake L4B. I mean this device will work for ft950 , isn't it? In the past I used to run ARB 704.
Thought I heard clicking of a mechanical switch relay so thinking this isn't an optically isolated switch? Didn't notice a clickable link to go find one of these to investigate further.
It's opto isolated but still a mechanical relay. You're thinking a electronic_ solid state relay an opto isolated relay simply isolates the input and output control of a mechanical relay with opto coupling devices.
You can find these on ebay or Amazon. Just do a search for Arduino relay board. Hundreds of links.