Search found 808 matches

by Dale H. Cook
Sun Jun 17, 2018 8:28 am
Forum: General Computers
Topic: Avocent HMIQSHDI restore factory defaults?
Replies: 1
Views: 49

Re: Avocent HMIQSHDI restore factory defaults?

Is it connected to a switch? If so I would connect a laptop set for DHCP to that switch (so it will pull an address in the same subnet), see what subnet it pulls, and run a network discovery utility on that subnet to see what is there. If the target system is not stealthed it should show on the netw...
by Dale H. Cook
Wed Jun 13, 2018 8:07 am
Forum: AM Radio
Topic: BE AM 1A Power meter not working in FWD
Replies: 11
Views: 335

Re: BE AM 1A Power meter not working in FWD

If you can't get the manual from BE let me know. I have a copy of revision C the 500A/1A manual that I downloaded from their site some years ago, dated 29-Aug-2011.
by Dale H. Cook
Thu Jun 07, 2018 11:12 am
Forum: Ask the Engineers
Topic: Laser projector and taking photo of displayed picture
Replies: 4
Views: 107

Re: Laser projector and taking photo of displayed picture

To add to Jeff's reply, the exposure should be the same as an integer multiple of the inverse of the frame rate. For example, a typical computer monitor refresh rate is 60 Hz. An exposure of 1/60 would probably work but an exposure of 1/30 might be a little better if the shutter speed and the refres...
by Dale H. Cook
Thu Jun 07, 2018 8:52 am
Forum: Ask the Engineers
Topic: Laser projector and taking photo of displayed picture
Replies: 4
Views: 107

Re: Laser projector and taking photo of displayed picture

This is more or less the same problem as taking a photo of a TV or computer monitor image. Your camera is not synchronized with the projector and the image is distorted. Why do you need a photo, and how will it be used? That may determine your alternatives.
by Dale H. Cook
Wed Jun 06, 2018 8:28 am
Forum: AM Radio
Topic: AM Tuning Unit Design Software
Replies: 9
Views: 317

Re: AM Tuning Unit Design Software

To follow up on the previous two posts, I still use RFS in DOSBox on a Win7 Pro 64 bit system. It has been my preferred tool for T network calculations for many years because it allows specification of phase shift for cusp rotation. The only missing feature is that it does not allow entry of existin...
by Dale H. Cook
Fri Jun 01, 2018 8:28 am
Forum: FM Radio
Topic: AF225 dip switch settings
Replies: 5
Views: 136

Re: AF225 dip switch settings

A supplementary note - the AF225 was an upgrade of the AF220, so the 220 DIP switch settings may be the same if anybody has that manual.
by Dale H. Cook
Thu May 24, 2018 7:50 am
Forum: FM Radio
Topic: Compression Question
Replies: 9
Views: 325

Re: Compression Question

You'll make a lot of friends at the station end of things if you deliver them a nice, clean, normalized program file with no unnecessary compression or limiting beyond what you feel is appropriate to produce a professional-sounding product. I will strongly second Deep, first as an engineer who has ...
by Dale H. Cook
Wed May 16, 2018 5:25 am
Forum: Everything else
Topic: Am I a possible engineer candidate?
Replies: 7
Views: 261

Re: Am I a possible engineer candidate?

I'll second Fossil about getting in touch with other broadcast engineers, especially because you mentioned AM directional arrays. Of all of the areas in broadcast engineering that you might work in DAs will likely be most foreign to your experience in electronics unless you are one of the small numb...
by Dale H. Cook
Tue May 01, 2018 7:43 am
Forum: FCC Discussion
Topic: RX-only C-band receive station registration, form 312
Replies: 41
Views: 978

Re: RX-only C-band receive station registration, form 312

Possibly not even 2 degree compliant. Certainly not 2 degree compliant. It appears to be a former AP dish ca. 1980-81. It is a Harris, possibly provided under contract to Scientific Atlanata who, IIRC, made the receivers for the AP dishes. Although I installed them when I was an AP field tech I don...
by Dale H. Cook
Mon Apr 23, 2018 5:28 am
Forum: Internet Streaming
Topic: Getting Through Windows Firewall
Replies: 8
Views: 355

Re: Getting Through Windows Firewall

Deep Thought wrote:
Mon Apr 23, 2018 12:12 am
What is the issue with this one?
There is no admin login or password on the label, no documentation in the transmitter building for this modem, and the usual suspects don't work with this Xfinity modem.
by Dale H. Cook
Sun Apr 22, 2018 3:14 pm
Forum: Internet Streaming
Topic: Getting Through Windows Firewall
Replies: 8
Views: 355

Re: Getting Through Windows Firewall

this is a very interesting topic And it isn't done yet. The problem is not in the Windows firewall or anywhere else in hardware/firmware that I have control over. This site uses a Comcast cable modem which includes a wireless router. Users do not have access to the router settings so I need to call...
by Dale H. Cook
Sat Apr 21, 2018 6:00 am
Forum: FCC Discussion
Topic: Management ignored me when I suggested LPFM....
Replies: 21
Views: 931

Re: Management ignored me when I suggested LPFM....

Bill DeFelice wrote:
Fri Apr 20, 2018 3:43 pm
Dale, any relation to Hall Electronics?
Bill -
The one and the same.
by Dale H. Cook
Thu Apr 19, 2018 7:15 am
Forum: Everything else
Topic: A bit of AM History
Replies: 4
Views: 247

Re: A bit of AM History

I like the Magic Marker notations on the front panel - that brings back memories. By about 1980 I had progressed to Dymo labels, and I now use a P-Touch labeler for such purposes.
by Dale H. Cook
Thu Apr 19, 2018 7:08 am
Forum: FCC Discussion
Topic: Management ignored me when I suggested LPFM....
Replies: 21
Views: 931

Re: Management ignored me when I suggested LPFM....

For those of you who don't know who "WREN" is, he is Jon Hall, a highly experienced radio engineer based in Charlottesville, VA, whom I have known for about twenty years. He is now also heavily involved in LPFM. Welcome aboard, Jon!
by Dale H. Cook
Wed Apr 18, 2018 10:48 am
Forum: FM Radio
Topic: Tower needed
Replies: 6
Views: 904

Re: Tower needed

Personally I don't care much for these so called self supporting towers. They are really not structurally strong and climbers usually hate working on them. ??? I have had self-supporting Pi-Rod towers installed. With their solid steel legs thay are plenty strong. I prefer solid leg towers to hollow...