Search found 183 matches

by davek
Tue Dec 11, 2018 4:59 am
Forum: FM Radio
Topic: Harris Z FM Diagnostics Failing
Replies: 4
Views: 237

Re: Harris Z FM Diagnostics Failing

Can you check if all of your Z-Plane ISO temperature levels readings are normal? If you see any that are way off, or indicated as ##.# then you've probably got an issue with either the ribbon cables to the ISO board assembly, or the ISO assembly itself is faulty. There are a couple of things that ca...
by davek
Sat Nov 10, 2018 9:45 pm
Forum: Broadcast Engineering News
Topic: Tiger Mountain (WA) master antenna catches on fire
Replies: 20
Views: 1120

Re: Tiger Mountain (WA) master antenna catches on fire

No VSWR shutdown? Depends on what type of combining system is in use. In a balanced combiner system the TX won't see any VSWR mismatch coming from the antenna. I've always wondered why it's not common practice to monitor the VSWR of the combined output, where antenna faults can be detected and tran...
by davek
Sat Oct 06, 2018 6:29 pm
Forum: STL Engineering
Topic: RVR PTRL-LCD transmitter PS
Replies: 7
Views: 554

Re: RVR PTRL-LCD transmitter PS

Nice find Dave! R4 on the main board is the start up supply resistor, so probably not ideal for measuring residual voltage stored in the main filter caps. In the past when I've worked on power supplies with no bleeder resistor across the main caps, I'll temporarily connect a 100W globe in parallel w...
by davek
Sat Oct 06, 2018 8:47 am
Forum: STL Engineering
Topic: RVR PTRL-LCD transmitter PS
Replies: 7
Views: 554

Re: RVR PTRL-LCD transmitter PS

It might be custom built, but most certainly based on a fairly standard design. Good luck with it :)
by davek
Wed Oct 03, 2018 4:56 am
Forum: STL Engineering
Topic: RVR PTRL-LCD transmitter PS
Replies: 7
Views: 554

Re: RVR PTRL-LCD transmitter PS

I've seen photos of this power supply and it doesn't look to be overly complicated. In the absence of a schematic I'd suggest a couple of things to try: 1. Check for any obvious problems on the primary side - open main fuse, shorted/open main rectifier, etc.. Also check the main switching FET, it sh...
by davek
Fri Sep 28, 2018 5:42 am
Forum: Everything else
Topic: Advice To Repair Power Antenna Cable
Replies: 4
Views: 259

Re: Advice To Repair Power Antenna Cable

Looks like a polystyrene film capacitor...
by davek
Fri Sep 21, 2018 5:34 am
Forum: FM Radio
Topic: TX + Bad Memory = Off Air
Replies: 10
Views: 866

Re: TX + Bad Memory = Off Air

Nautel has a document (IS13004A) that details how to prepare a new compact flash card for the NV series. The recommended capacity for the CF card is 4GB.
PM me your email address and I can send you a copy.
by davek
Sat Jul 14, 2018 3:49 am
Forum: FM Radio
Topic: Remote Control Recommendcations
Replies: 13
Views: 644

Re: Remote Control Recommendcations

I would rate Statmon among one of the worst pieces of rubbish ever written.
by davek
Thu Jun 28, 2018 3:55 am
Forum: FM Radio
Topic: Mystery Socket in Radio Hut
Replies: 9
Views: 376

Re: Mystery Socket in Radio Hut

Wouldn't it be easier to cut the plug off and fit a NEMA 6-15 plug and receptacle instead?
by davek
Mon Jun 04, 2018 10:19 pm
Forum: Ask the Engineers
Topic: Burk Auto Pilot Win 10 display issue
Replies: 2
Views: 204

Re: Burk Auto Pilot Win 10 display issue

Did you ever figure out the file to delete?
I'm wondering if running in Windows 7 Compatibility mode might help too...
by davek
Sat Mar 17, 2018 4:41 am
Forum: AM Radio
Topic: GatesAir suspends AM TX sales (Radio World)
Replies: 33
Views: 1650

Re: GatesAir suspends AM TX sales (Radio World)

I think maybe it's time I relocate to the USA to open a switchmode PSU repair shop 8)
by davek
Thu Mar 08, 2018 8:35 pm
Forum: FM Radio
Topic: Harris Z-series with Burk Plus Connect interface
Replies: 1
Views: 357

Re: Harris Z-series with Burk Plus Connect interface

According to the documentation from Harris there are 2 status items in the serial protocol. As to what the difference is, I am not sure. Just pick whichever one works for you :D   Capture.PNG   As for the Z20, the system controller is from the PT transmitter era. There is no serial connection availa...
by davek
Wed Mar 07, 2018 1:51 am
Forum: Administrator Announcements
Topic: SSL Certificate
Replies: 21
Views: 1323

Re: SSL Certificate

Seems to be working well .. thanks Chris!
by davek
Sun Feb 11, 2018 7:26 am
Forum: Digital Television
Topic: Collision of Frame Rates Internationally
Replies: 2
Views: 243

Re: Collision of Frame Rates Internationally

First up, Tour de France and Eurovision are produced natively at 25 frames per second, and at minimum in HD (Euro might be 4K now). Since these are "big ticket" items they will be delivered internationally in high quality. Hence they look good on Aus HD channels. Contrast this to news, where immedia...
by davek
Mon Jan 29, 2018 12:42 pm
Forum: FM Radio
Topic: Harris/Gates support
Replies: 24
Views: 2182

Re: Harris/Gates support

They ended up selling us an HT30/35 IPA Power Supply retrofit kit that might work for $1200. I'm happy to report that she's been happy ever since... but this transmitter is less than a decade old and they won't support it? How ridiculous is that! $1200? Is it gold plated and capable of doing your t...