Search found 417 matches

by grich
Mon Feb 18, 2019 1:51 pm
Forum: AM Radio
Topic: Gates One Blows PA Fuses w/ Modulation
Replies: 26
Views: 1299

Re: Gates One Blows PA Fuses w/ Modulation

Fuse holders are cheap and usually not at all difficult to change. Nautel had an issue some 10 or so years ago with a bad batch of fuse holders. After a problem with one I replaced all of them on the ND25 just taken out of service this past summer. No fault of Nautel - blame it on the maker of the ...
by grich
Thu Feb 14, 2019 11:51 pm
Forum: FM Radio
Topic: Optimod 2200
Replies: 3
Views: 209

Re: Optimod 2200

I had this happen once with a 2200 at a site with poor AC power regulation. I rebooted the unit to fix it, then put it on a UPS. No more troubles.

I have another 2200 at a different site that I haven't had an issue with, but I also put it on a UPS as a precaution.
by grich
Thu Feb 14, 2019 9:55 am
Forum: Radio Studio Engineering
Topic: DBX286 with an 8Khz whine from the de-esser
Replies: 4
Views: 171

Re: DBX286 with an 8Khz whine from the de-esser

WAG, since I never worked on one...look for dried-up caps on the power supply rails.
by grich
Tue Jan 29, 2019 10:31 am
Forum: Ask the Engineers
Topic: Snow removal on 5 meter dish
Replies: 7
Views: 342

Re: Snow removal on 5 meter dish

On most dishes at the day job, we're using an extendable pole with a squeegee modified by the boss to have a curved surface to match the dish best as possible.
by grich
Mon Jan 21, 2019 10:37 pm
Forum: AM Radio
Topic: Gates One Blows PA Fuses w/ Modulation
Replies: 26
Views: 1299

Re: Gates One Blows PA Fuses w/ Modulation

I would strongly suggest finding a way to do the internal measurement under power without cheating interlocks. There’s often a way of sneaking a couple of test leads out of the cabinet without bypassing interlocks. Different situation but I once had to measure some voltage in a Continental 315F 10k...
by grich
Sun Jan 20, 2019 2:44 pm
Forum: FM Radio
Topic: Gotta love Westwood One
Replies: 2
Views: 166

Gotta love Westwood One

Got a call from a client while shoveling snow...local breaks aren't firing in the NFC Championship game. The PD had rechecked his automation programming and all looked well. I told him to call WWOne NetOps...they will check your receiver, tell you everything looks good, and the breaks will magically...
by grich
Tue Jan 01, 2019 12:48 am
Forum: AM Radio
Topic: Gates One Blows PA Fuses w/ Modulation
Replies: 26
Views: 1299

Re: Gates One Blows PA Fuses w/ Modulation

I've never worked on a Gates One, but it's basically an SX-1 with many of the mistakes removed... Before the PA fuse blows, is there an obvious imbalance in the PA phases? Follow the procedure in the manual to test in-circuit ALL of the PA MOSFETs and the PDM Amp MOSFETs. Be sure to use a suitable V...
by grich
Thu Dec 20, 2018 4:29 pm
Forum: From the Trenches
Topic: "Help" desk
Replies: 11
Views: 744

Re: "Help" desk

Love talking to first-level support that insist on working the script, even though your introduction to the problem stated all of the obvious first troubleshooting steps had been taken. Perhaps side-tracking the thread, but I've found it interesting that the two most productive IT troubleshooting ph...
by grich
Fri Dec 14, 2018 9:54 pm
Forum: From the Trenches
Topic: Make the whole house shake
Replies: 9
Views: 440

Re: Make the whole house shake

I usually won't be caught dead in an equipment rack during a newscast. Twenty-some years ago I bumped a prompter DA once during a newscast and made it blank for a second. Caught more hell from that (all from the on-air anchor) than the three times I messed up the station signal in front of three dif...
by grich
Thu Dec 13, 2018 5:51 pm
Forum: TV Engineering
Topic: Computer-controlled small L-band switches?
Replies: 9
Views: 734

Re: Computer-controlled small L-band switches?

... I remember thinking, back when we bought the 40x40 Utah AVS-1 back in 1984, that it was big enough that we would never outgrow it... :lol: I think our AVS-1 started out 40x40 mono, then expanded to 60x40 stereo (but only for the first 40 inputs). Full long before I arrived in '94. Kinda miss it...
by grich
Mon Dec 10, 2018 5:03 pm
Forum: FM Radio
Topic: Harris Z FM Diagnostics Failing
Replies: 4
Views: 249

Re: Harris Z FM Diagnostics Failing

So to review, all ISO temps, module current, etc, are about the same? I recall one conversation with Walter that mentioned an occasional issue can be the ribbon cables themselves. I assume you've reseated them all. In some rare instances, they can become intermittent due to air currents moving them ...
by grich
Mon Dec 10, 2018 12:39 pm
Forum: TV Engineering
Topic: Computer-controlled small L-band switches?
Replies: 9
Views: 734

Re: Computer-controlled small L-band switches?

...Did you notice that last month Evertz bought Quintech?... No I didn't...great. :roll: We do use Quintech active splitters and LNB supplies. Rolling your own sounds like a fun project. I had to build up some small perfboards with terminal blocks and optos earlier this year, and I wondered when wa...
by grich
Fri Dec 07, 2018 12:56 pm
Forum: TV Engineering
Topic: Computer-controlled small L-band switches?
Replies: 9
Views: 734

Re: Computer-controlled small L-band switches?

We use Compusat software... I'd give Andrew a call and see what he recommends. You have to buy something he can talk to anyway. :wink: We've never used a matrix control at my TV day-job, all of the receivers we use have four-port switches built-in, and along with active splitters for each dish, we ...
by grich
Thu Nov 22, 2018 9:31 pm
Forum: Everything else
Topic: GOBBLE, GOBBLE!
Replies: 12
Views: 572

Re: GOBBLE, GOBBLE!

I am spending Thanksgiving on-call for my 35th straight year... You old! On-call since 1981...does that make me old too? :lol: I did have one call...someone screwed up a shared video folder. A quick VPN session took care of it, then out to the grill to burn some burgers...the family turkey meal is ...
by grich
Mon Nov 19, 2018 11:17 am
Forum: AM Radio
Topic: KYFR AM tower light monitor
Replies: 16
Views: 742

Re: KYFR AM tower light monitor

RGORJANCE wrote:
Sun Nov 18, 2018 8:35 am
Worked out in SW Iowa on a directional...
There are only a couple of directionals in SW Iowa that I'm aware of...KMA and KYFR. Found any burned-up OIB leads in your TX buildings, Mr. Brockmeyer? :D