I suppose the M2 is better than nothing, but its accuracy was far from what you'd need to assure FCC compliance. I wonder what the FCC uses, by the way, when they investigate overmodulation complaints? There was one pirate station in my town a few years ago that was running 40 kHz deviation on their...

I owned one of those units for a couple of months. The blue LEDs were bright enough to light up my entire house! Unfortunately even after a trip to the factory to be updated and calibrated, the unit still didn't perform up to my requirements and I refused to send it to them for another month. The qu...

That simple circuit is fine for indoor use, but if you need to go below freezing, you need an alternate circuit that biases the LM34 upward by about two diodes-worth. That'll give you temps from -50F up to over 200F. You can also use a small wall-wart DC supply rather than the battery. In fact, does...

I think the big Collins MW TX at the VOA/Bethany station was vapor cooled. Unfortunately that entire site (some 600+ acres) was taken out of service sometime in the 1990s and they put condos on the ground. I heard they moved the TX to a museum and were trying to get it going again. I bet the copper ...

And it doesn't help that their support web site (support.radioshack.com) is not responding.

Bob M.

I'm not familiar with the FM3.5, but if it's running on 3-phase AC power, perhaps one of the phases is dropping out. I had a similar problem with a Continental 20kw 816R2 that uses SCRs in the xfmr primary to regulate the HV. Turns out a 3PDT 24V relay was bad and it was intermittently dropping the ...

It just seems that two series LC circuits in parallel, with only a 1kw power capacity, shouldn't take up a full rack cabinet's worth of space. To be fair, the phasor at the 1kw station is quite small; it takes up one rack width and is maybe a few feet tall, about the same size as the AM1A tx. I'm gu...

I didn't do the EPM spectrums for one station in 2016 but I was asked to do it in 2017. Both are running B-E transmitters, the one producing the mixing is only 1kw directional full-time. I looked hard to find the mixing sum but it just wasn't there. The carrier was 320mV/m which is certainly healthy...

Mark: Perhaps your subscription, like mine, finally expired. Email Kwentin K. Keenan, Circulation Manager, NewBay: kkeenan [ at ] nbmedia [ dot ] com and let her know. She sent me a link to a personalized subscription screen that I just had to answer some questions on, and after that she sent me lin...

According to the current Opera downloads requirements, Windows 7 and higher, just like everybody else. It MAY have worked with WinXP at one time and there MAY still be a version one could download that supports it, but their download server or gateway is currently inoperative so I couldn't get to th...

I never even knew there was an "Author's Page". Maybe I've just never fully perused the older web site. At times it was so cluttered I'd close my eyes and just click on the menu item I wanted to see, and could easily get to the article that interested me. The new site seems to be aimed solidly at th...

"The new phone books are here! The new phone books are here!" (from Steve Martin's "The Jerk") I actually got an email from the circulation/subscription person yesterday with a link to the March 14 2018 issue of RW. Paul McLane said they're slowly putting content back on the site. How far back is un...

Now, does Opera work under WinXP? Since I'm still in the stone age (and enjoying all the programs that work in XP without aggravation), that's an obvious requirement.

Bob M.

"Do you mean that it lost the http:// info? That should still be accessible under Tools|Options|Security|Saved Logins." I think the issue was that the previously saved username/password was for the http:// URL, and since the https:// URL is not identical, Firefox couldn't auto-fill the username/pass...

The site doesn't seem to be accessible at all now with IE8, either http or https. Luckily Firefox got me in but it lost the saved login info.

Bob M.