In the HAM radio community, we usually help each other out with equipment and parts.
This ranges from teaching someone how to build/do things, where to buy the best equipment/parts, suggestions for equipment and often we trade or give equipment to each other.
A few months ago, I asked around to see if anyone had a SSB (Single Side Band) CB radio I could buy so that I could modify it to work in the 10 Meter band.
Another HAM had two, and gave them to me so that I could work on the conversion.
One of them was a Realistic TR-47, which I found the modification instructions for.
There are just a few problems I ran into trying to complete this modification:
- I needed a microphone for this CB.
- No problem here, Amazon had them for about $10.
- The 7 crystals needed to be replaced.
- This wasn't so easy.
- Trying to find these crystals turned out to be very difficult as many of the specific frequencies are rare these days, and the pricing for them started getting outrageous.
Well, the other day, after cleaning up my office/shack, I contacted this other HAM and told him that I couldn't get the work done easily and if he wanted the radios back.
He said he'd take them back, but he really didn't want them either. Then he suggested that I hold onto them and take them to the next club meeting and see if anyone wanted them.
I didn't want them in the house anymore, as I didn't have a lot of space with them sitting there and not working for me.
Well, since I was going to drop them off at his house, he told me he had an HF antenna tuner that wasn't working 100%, and asked if I wanted to have it.
I told him he made me an offer I couldn't refuse.
These tuners are actually pretty simple circuits, as the primary parts of it are a tapped inductor with a switch and a couple of variable capacitors.
What he said wasn't working was the SWR meter and tuning status indicator
While sitting at his place for a bit, he showed me the inside and the board that wasn't working was pretty simple and straight forward.
Today I'm at the corporate office so I printed out the schematic and the manual.
Looking at it, there really isn't much at all to the circuit and I'll have a pretty easy time going through the parts to determine what's working and what's not.
I'll probably desolder the entire board, and test the printed circuit board, and then all the parts.
It's best to do it this way, so that I can accurately test each part with out the possible influence of the other components on the circuit.
The problem I have with testing out this tuner is that I don't have an HF radio with enough power to really test this out correctly.
When I finally get my new QRP, CW radio in, it's 5 watts should be enough for me to test out the tuner.
In the mean time, I'll get it to another HAM and have him play with it to confirm what's not working.
Although, it might just be better to work on it first, then let him test it out if my new radio hasn't arrived by the time I'm done putting it all together.
I don't really think of the exchange and receiving of HAM radio gear as gifts, but it sure as hell is nice to not pay for stuff!