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Leland . . . Welcome to the group. This group is rather quiet but I'm sure if you have a question someone will answer. We just opened this group below as a catch-all for vintage radios and you're

Just joined this group.? I don't know why I had not done so up until now as I own a lot of Johnson gear.? My friend WA5VGO got me interested in finally restoring my Viking 500 transmitter which I

Name? . . . I would start with looking at audio transformers, maybe the type that are on PA system speakers to drop the impedance down to 8 Ohms from the 70 volt PA system line. Or maybe fashion a

As the Challenger one piece radio chassis has no Low Z Audio output -to easily couple to a microphone input (for a cheaper Repeater system)- has anyone brewed a simple Hi to Low Z adapter/isolater to

This group is a basic (free) group, created after Feb, 2021, so it does not have file storage. Donald KX8K ---------------------------------------------------- Some ham radio groups you may be

Somewhere in the Repeater Builders Group , I found mention of your group having Radio? Service Manuals. I need PDFs of the 242-7186 Challenger UHF series, and I don't see any specific place? on this

Depending on the quality of your phone camera, you can use Microsoft Lens, and it does a fine job of "scanning" files and creating PDFs or whatever else file-type you like. Android Version (

Using the "Edison" method, I figured out how to configure my NAPS2 program to do what I want. I now have fairly nice scans of all three manuals. Thanks to all who replied and tried to help. 73, Dick,

Dick . . . Most scanners come with a free scanning software package. If it came with PaperPort SE, that might be just what you need. The cost of the full version will be over $100, I think. Here's an

I acquired original manuals for the Mobile HF Transmitter and the Mobile VFO. The pages have yellowed in various degrees. I would like to scan them and clean them up. My attempts with NAPS2 Freeware

Not bad. Might be worth joining to see what's there and if it's worth continuing. Donald KX8K wrote: ---------------------------------------------------- Some ham radio groups you may be interested

Dennis . . . wrote: Looks like you could eliminate the complex circuit and just make a switchbox with a DPDT switch, and terminals on a box to flip ground and hot sides. The switch could be set so

The foil tester must be in a metal box (Hammond 1590A) to shield the circuit and keep noise down. The cables are shielded up the alligator clips and the shield is isolated from the clip so only the

Mr. Carlson's Lab has price tiers at $2, $5, $10, and $20 per month. The lowest tier allows access to all the videos, schematics, parts, print files. Higher tiers allow more communication and help. --

Dennis . . . wrote: There are some ways of testing which terminal of a cap has the outer foil attached to it. Mr Carlson's approach might be different but several ways use noise as a way to detect the

What does it cost to join that? I know some charge for their material, some don't, and some charge for some of their material but not for other material they host there. Donald KX8K wrote:

I have been in contact with Terry - he is a friend of a friend. I would guess he is out of the C9 cap replacement boards as the number was limited. I am not going to worry about it for now and see if

I haven't even looked at the 122 VFO yet or the NC-300 receiver. I am leaving the bottom off to remind me to grab my voltmeter and start testing. It might have to wait until next week. I will have a

I almost hate to say it for fear of stating the obvious and known etc. but be sure to replace that bad "Chernobyl" resistor in the VFO 122. Lots of info on the web on that... Wireless Girl etc.. and

"Most" of those whom I asked about the oil filled cap said leave it alone if not leaking. I cannot recall what Nick England said when I asked on the Boatanchors list. I asked my ham friend who is