A bit OT for your comment but I couldn't find an Email address for you. Someone mentioned to me you are looking for details to program an Icom U101. From memory, this uses the same method as the Icom ic H10. It may be worth searching for details for the H10- I believe they were more common. In fact, I'm sure I've programmed an H10 in the past for someone else. Unfortunately, over the years, I've programmed many radios and the details escape me at the moment 73 Brian, G8OSN www.g8osn.net
Thanks Brian, I'd given up trying to find software to program it, looks like there's DOS software for the H10 so I'll try and work out which one and then obtain it.
Plans are to test the radio on 70cm, once I know it works properly I've got 'ideas' for it.
A quick update, I needed a heatsink so I found one from an old PC which is more than adequate, weighing in at almost 650 grammes I reckon it should be able to handle the heat. Problem though, it's not flat. Which makes it kind of difficult to mount the board. Now, I could use some standoffs, PCB pillars cut to length but I'm a little light on machine tools to make an accurate job of it and it'd annoy me that it was 'wobbly'. As it happens, I recently bought myself a new toy. A Flashforge 3D printer so this seemed an ideal opportunity to learn to use a CAD program and find out how dimensionally accurate the printer is. It turns out, it's pretty good. And the PLA takes a thread really nicely. So, my Mini PA board now has mounts, I just need to drill and tap some holes in the heatsink.
I bought a very cheap Yaesu VX1-R dual band handy last year, it's a cute little thing that covers 2 and 70 but unfortunately it came without the battery. No problem, if it works I'll just buy a replacement, simple. But WOW, the FNB-52 battery is *expensive*, more than three times what I paid for the radio and I could not find one in stock anywhere (I have since found them)... I did find out that the battery pack is a standard 14650 Li-Ion cell in a molded plastic case (presumably including a battery management circuit) and a quick search of everyone's favourite tat bazaar eBay found a pack of two for a not expensive £9 so I ordered some and waited. When they arrived I gave them a few hours on charge and then tried one in the handy, it worked but of course it rattles about and runs the risk of being damaged or, worse, exploding if charged incorrectly as the cell isn't 'protected'. Now I do have a charger but it meant I'd have to remove th...
We've all seen switching FETs used as PA devices in HF radios, I've experimented with them a few times, lashing up circuits using IRF520s and, my favourite, the FQP13N10, they can produce some useful power for such a cheap device and if you drive them hard, they give some serious power, at 24 volts, with a shade over 3 watts drive I've measured 45 watts output at 30MHz from a single device into a dummy load (you really don't want to put one on the air like that though, the output was horrible) When you drive them hard, they're fragile, gouts of smoke, chunks of epoxy encapsulation flying across the room and dead fuses are easy to obtain so, I gave up, 'proper' RF devices aren't that much more expensive and are designed for use in radios. So, why am I talking about them again? Well, I bought myself one of the Chinese eBay specials, a Mini PA 70W HF amplifier that uses a pair of IRF520* devices to produce a reputed 70 Watts output. (I've no idea ...
Hi Clint,
ReplyDeleteA bit OT for your comment but I couldn't find an Email address for you. Someone mentioned to me you are looking for details to program an Icom U101. From memory, this uses the same method as the Icom ic H10. It may be worth searching for details for the H10- I believe they were more common. In fact, I'm sure I've programmed an H10 in the past for someone else. Unfortunately, over the years, I've programmed many radios and the details escape me at the moment 73 Brian, G8OSN www.g8osn.net
Thanks Brian, I'd given up trying to find software to program it, looks like there's DOS software for the H10 so I'll try and work out which one and then obtain it.
DeletePlans are to test the radio on 70cm, once I know it works properly I've got 'ideas' for it.