Search found 46 matches

by radio_guru
Sat Oct 20, 2018 12:23 pm
Forum: Radio Automation Systems
Topic: Suppressing Windows 10 Update and Forced Reboots
Replies: 6
Views: 81

Re: Suppressing Windows 10 Update and Forced Reboots

There are a number of registry hacks identified and tried. None work long term. MS has one by one written out the loopholes. All you can do is put them on an isolated switch to the outside world and run them without any means to access the WWW. That means running a machine that is double NIC'd bridg...
by radio_guru
Fri Oct 19, 2018 2:46 pm
Forum: Radio Automation Systems
Topic: Suppressing Windows 10 Update and Forced Reboots
Replies: 6
Views: 81

Re: Suppressing Windows 10 Update and Forced Reboots

We're exploring that issue now. We have found that Win10 has only one version that does not readily install updates as MS wants/chooses. That is Win 10 LTSC (Long Term Service Channel). It is intended, however, for large organizations and can only be bought through a volume licensing plan. It's impl...
by radio_guru
Wed Aug 08, 2018 2:06 pm
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 960

Re: Capacitor replacement.

With a 138 deg. tower, be very careful about adding anything across the base and not creating some hiccups on 1400. Even an extraordinarily high impedance thing such as a SDC can corrupt the match of a wild base impedance. But as others have mentioned, the capacitor bus at each end should be bonded ...
by radio_guru
Mon Aug 06, 2018 6:54 am
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 960

Re: Capacitor replacement.

I agree that it will in all reality not on most towers. The original post didn't specify if the tower was 90 deg. or something more wild. Like 130 deg.---Which is sensitive to just about anything that might change. And my suggestion to keep them all the same is more a reflection to avoid creating a ...
by radio_guru
Sat Aug 04, 2018 9:26 am
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 960

Re: Capacitor replacement.

May be joining in this thread late. Apologies. I just went through this with Harris coils over the past 18 months. I needed to retrofit three towers with Harris OEM coils which didn't have the bypass caps on them originally as part of a site rehab project. (Why not buy new??...well the array was OEM...
by radio_guru
Mon Jun 18, 2018 11:59 am
Forum: AM Radio
Topic: Transmitter plant ambient temps?
Replies: 15
Views: 1200

Re: Transmitter plant ambient temps?

Let me be quick to the point....One needs to consider UPS batteries first and foremost over the SS gear. Lead acid cells designed for UPS service loose considerable capacity and life span when they get too hot or cold regardless of draw or charge state condition. While SS gear can tolerate temps bel...
by radio_guru
Mon Jun 18, 2018 11:49 am
Forum: AM Radio
Topic: Wavering field intensity
Replies: 9
Views: 520

Re: Wavering field intensity

I know which station Mark speaks. I was part of that station's original tune up in 1991. What fun that was... I've seen skywave occur any time of day. Though it's rare, mid-day skywave can occur when the sun is low in the horizon, such as December. I was doing a partial check-up for a station just a...
by radio_guru
Mon Mar 12, 2018 6:25 pm
Forum: FM Radio
Topic: High intensity strobe light repair
Replies: 3
Views: 450

Re: High intensity strobe light repair

It really depends on the manufacturer. I have the old EG&G system now supported by Hughey and Phillips. It's getting pretty costly to keep them going. But H&P still supports them for the most part and they're not too bad to work on. 95% of the problems are in the high voltage areas. Failed relays, d...
by radio_guru
Mon Mar 12, 2018 6:15 pm
Forum: AM Radio
Topic: ground strap thickness
Replies: 10
Views: 650

Re: ground strap thickness

Your best bet is to connect the service panel to a well beyond NEC minimum enhanced earthing system ring which is also the RF and tower ground. In Chicago, that's called a Hogan Ground where the panel is bonded to a much larger ground system covering multiple devices and services as well as structur...
by radio_guru
Wed Feb 14, 2018 2:17 pm
Forum: AM Radio
Topic: Audio Bandwidth of an AM Broadcast Station
Replies: 19
Views: 1566

Re: Audio Bandwidth of an AM Broadcast Station

Never mind that with a FM translator, station owners have no motivating reason to care about their AM audio quality. It can sound like it's coming on a string and tin cans. Doesn't matter a hill of beans as long as the thing is on the air at licensed power and pattern. I will say I have started usin...
by radio_guru
Sat Feb 03, 2018 10:44 am
Forum: FCC Discussion
Topic: FAA/FCC Regs
Replies: 3
Views: 547

Re: FAA/FCC Regs

The rules are for ***all*** structures above 50ft. which are smaller than 10 outside diameter/profile, outside of municipal boundaries, and not adjacent to any buildings. IOW, locations where crop dusters and other low flying aircraft will operate. My birds are tweeting there is a revision in the st...
by radio_guru
Sat Feb 03, 2018 9:33 am
Forum: FM Radio
Topic: Harris/Gates support
Replies: 23
Views: 1910

Re: Harris/Gates support

Is there a possibility the PS schematic is available...in the manual. For $2300, I would certainly look into field repair. Likely a bad cap or something easy to swap out. You can buy a lot parts for $2300 and bring back to life a spare. The above not withstanding, there are a lot of unitary PS's out...
by radio_guru
Sat Feb 03, 2018 9:19 am
Forum: AM Radio
Topic: 317c1 parts
Replies: 11
Views: 831

Re: 317c1 parts

I have a NX25 in a well insulated lower midwest building and I do need to supplementally heat the building. I find it funny the ND10 back-up TX emits more heat than the NX25. That siad, I can cool outside 95 deg. drybulb temp with an 80 deg. wet bulb (dew point) by only a single 3 tonne air conditio...
by radio_guru
Thu Jan 18, 2018 7:28 pm
Forum: FM Radio
Topic: Harris/Gates support
Replies: 23
Views: 1910

Re: Harris/Gates support

Problem with CEC is they no longer have any 24/7 support at all. It's 9-5, leaving out noon-1 for lunch. The guys there are still top notch. But the reality is they're out of making new FM and AM broadcast TX's and are there just to support what's out there (besides building big shortwave TX's). Som...
by radio_guru
Sun Jan 07, 2018 9:13 pm
Forum: Ask the Engineers
Topic: Convert to LEDs, or leave 110v?
Replies: 10
Views: 980

Re: Convert to LEDs, or leave 110v?

I did just that with some RCA replica fixtures. I procured 1M long strips of NFLS-R300-X3 series red LEDS from superbrightleds.com Super bright emission. Blindly bright In my fixtures, I went one step farther. I also installed strips of amber and "wig-wag"d the amber and red using a flasher from: ht...