Search found 156 matches

by davek
Wed Oct 11, 2017 10:59 pm
Forum: FM Radio
Topic: Continental 816R-3C IPA
Replies: 9
Views: 404

Re: Continental 816R-3C IPA

Another option for to consider: I have seen on Mark Persons' website the work he does to replace failed IPA boards with modules from Broadcast Concepts.

For example...
http://www.mwpersons.com/tech-tips/FM/C ... 5A-ipa.htm
by davek
Sat Sep 02, 2017 2:32 am
Forum: Radio Studio Engineering
Topic: Arrakis Console issue
Replies: 7
Views: 432

Re: Arrakis Console issue

Just a guess: it sounds like that channel has a faulty op-amp that might be dumping DC onto the PGM or AUD buss when the channel is enabled... hard to say without seeing the circuit documents though.
by davek
Wed Aug 16, 2017 6:22 pm
Forum: FM Radio
Topic: Nautel NV20 repair/restoration
Replies: 3
Views: 308

Re: Nautel NV20 repair/restoration

(placeholder for initial testing)
by davek
Wed Aug 16, 2017 6:22 pm
Forum: FM Radio
Topic: Nautel NV20 repair/restoration
Replies: 3
Views: 308

Re: Nautel NV20 repair/restoration

(placeholder for PA repairs)
by davek
Wed Aug 16, 2017 6:18 pm
Forum: FM Radio
Topic: Nautel NV20 repair/restoration
Replies: 3
Views: 308

Re: Nautel NV20 repair/restoration

If there was going to be any chance of restoring this transmitter, the power supplies seemed like a reasonable place to start. In this model there are 20 main power supplies - 16 for each of the PA modules (plus 2 more for each of the IPA modules contained therein), and 2 power supplies for PA and r...
by davek
Wed Aug 16, 2017 6:17 pm
Forum: FM Radio
Topic: Nautel NV20 repair/restoration
Replies: 3
Views: 308

Nautel NV20 repair/restoration

Thought the board might be interested to follow the progress of a project I'm currently working on, which is the repair and restoration of a Nautel NV20 transmitter. This TX was installed about 7 years ago; I imagine some of you thinking "why does a 7 year old Nautel need to be restored ?". Well sad...
by davek
Wed Jun 28, 2017 5:45 pm
Forum: FM Radio
Topic: Nautel NV10LT
Replies: 21
Views: 2208

Re: Nautel NV10LT

We have had an NV30 for about 7 years. Had a problem at first blowing PA module 7. After we installed a shorting stub next to the output that problem ended. Now we just go thru a power supply or two a year. Fixed a couple by cleaning the bug juice out of the fan. If anyone (davek) has any tips on r...
by davek
Tue Jun 20, 2017 6:50 am
Forum: FM Radio
Topic: Nautel NV10LT
Replies: 21
Views: 2208

Re: Nautel NV10LT

.. is there any service information available for the old Tectrol power supplies used in the NV series? From us, no - it was part of the agreement with the former Tectrol that service information wasn't part of the deal. I assume they didn't want us to start building them ourselves! However, CUI (c...
by davek
Tue Jun 06, 2017 5:27 am
Forum: TV Engineering
Topic: DVB Transport Stream Checking using UDP
Replies: 2
Views: 369

Re: DVB Transport Stream Checking using UDP

The DTU-245 doesn't handle TS over IP.

If you want to look at TS over IP, you can use VLC to view either the UDP or RTP stream (I'm assuming that's what you want to do, your original post is lacking in detail...)
by davek
Wed May 17, 2017 5:56 am
Forum: FM Radio
Topic: Nautel NV10LT
Replies: 21
Views: 2208

Re: Nautel NV10LT

Sorry to revive an old topic (and this is mostly directed at Jeff) .. is there any service information available for the old Tectrol power supplies used in the NV series? I've been repairing and modifying a bunch of them (replacing the awful green semiconductor insulators with proper silicon pads), ...
by davek
Mon May 01, 2017 5:03 pm
Forum: FM Radio
Topic: BW Broadcast transmitter
Replies: 10
Views: 887

Re: BW Broadcast transmitter

Sounds like a switch-mode power supply refused to re-start after being turned off...
by davek
Tue Mar 07, 2017 5:29 pm
Forum: General Computers
Topic: Unplayable audio files
Replies: 9
Views: 717

Re: Unplayable audio files

Any chance of making a file available.. ?
by davek
Thu Mar 02, 2017 3:54 pm
Forum: FM Radio
Topic: High Pitched Tone in FM Audio?
Replies: 23
Views: 1626

Re: High Pitched Tone in FM Audio?

grich wrote:
Thu Mar 02, 2017 3:40 pm
davek wrote:
Thu Mar 02, 2017 3:38 pm
Here you go :)

FM-535-WCF.pdf
FM-580-WCF.pdf
You beat me to it! :D
Must have been the coffee I had for breakfast :lol:
by davek
Thu Mar 02, 2017 3:38 pm
Forum: FM Radio
Topic: High Pitched Tone in FM Audio?
Replies: 23
Views: 1626

Re: High Pitched Tone in FM Audio?

Here you go :)
FM-535-WCF.pdf
(197.37 KiB) Downloaded 67 times
FM-580-WCF.pdf
(56.35 KiB) Downloaded 57 times
by davek
Wed Feb 22, 2017 3:45 am
Forum: FM Radio
Topic: Z 10 rigs
Replies: 4
Views: 528

Re: Z 10 rigs

I have also successfully repaired Z PA modules .. transistors were purchased from DigiKey.

Also, having since totally re-built the rectifier modules using different fuses, I have not had a single PSU TAP fault in the 18 months since installing them. :D