Search found 1382 matches

by RGORJANCE
Mon Sep 25, 2017 6:10 am
Forum: Ask the Engineers
Topic: Telecom - RF Optimization Engineering
Replies: 2
Views: 72

Re: Telecom - RF Optimization Engineering

The tired, the poor, the huddled masses yearning to be free----RF broadcast engineers. Been doing it since 1956, and still having lots of fun!. Is there something wrong with my picture???? :D Oooops, I forgot to add hungry. Deep Thought nailed it. There will always be a need for RF engineering. Fossil
by RGORJANCE
Tue Sep 19, 2017 12:48 pm
Forum: Everything else
Topic: FUNCTION GENERATOR
Replies: 0
Views: 61

FUNCTION GENERATOR

Guys: Was digging around on the App Store for some incidental software for my tablet and discovered a really nifty, free function generator software package by Keuwlsoft. It does sine, square, triangle white and pink. I think as a quick, easy to transport tool, I could make some adaptor cables for X...
by RGORJANCE
Tue Sep 19, 2017 12:37 pm
Forum: AM Radio
Topic: DX-50 works as speaker
Replies: 6
Views: 611

Re: DX-50 works as speaker

Overheated/hot connections can very easily be found using a laser pistol grip thermometer. Been using them for at least 10 years. Run the xmttr for a day, put the backup on, open it up and start pointing. You will find the hot ones really fast. However, be aware that the cheap laser temp devices rea...
by RGORJANCE
Sun Sep 03, 2017 7:40 am
Forum: Radio Studio Engineering
Topic: Arrakis Console issue
Replies: 7
Views: 376

Re: Arrakis Console issue It's a special form of torture.

Sorry to hear of your problems. I must have installed maybe 14 or15 of them of the 12,000 and 22,000 series with only very limited troubles over many years. Most were switch tops breaking and there for a period of time, I lost some of the VCA chips until we got the latest versions. They were pretty ...
by RGORJANCE
Fri Sep 01, 2017 6:18 am
Forum: AM Radio
Topic: DX-50 works as speaker
Replies: 6
Views: 611

Re: DX-50 works as speaker

It has been many years since I was inside a DX-25/50 so it would help to know which of the 4 variable caps, by circuit designation, in the output network, that you are referring to. It's repeated failure might be caused by something else in the output network/load . And the "accountant scenario" you...
by RGORJANCE
Mon Aug 21, 2017 10:49 am
Forum: Everything else
Topic: 2017 Eclipse
Replies: 4
Views: 234

Re: 2017 Eclipse

Meh! If you've seen one eclipse, you've seen them all. Saw one back in the 40's sometime when I lived in Flushing, Long Island, Neeeew Yooork Ciiity. Dad smoked up a glass with some carbon and we looked at the sun. Today, I'll probably think it's bedtime and fall asleep in my chair.....like I usuall...
by RGORJANCE
Tue Aug 15, 2017 7:31 am
Forum: AM Radio
Topic: Gates MW-5 Problem - FOUND IT
Replies: 7
Views: 536

Re: Gates MW-5 Problem

It has been about 25 years since I worked on an MW-5 so I am really rusty. Only thoughts are possibly the damper diode breaking down as the voltage comes up. I seem to recall replacing a coil that might have been part of the PDM filtering but can't recall the symptoms. I had one other instance that ...
by RGORJANCE
Mon Aug 14, 2017 3:41 pm
Forum: AM Radio
Topic: DX-10 Controller Probs
Replies: 9
Views: 488

Re: And the guy in the picture sits in the cubicle next to me in his current gig.

Weeeelllll! Time for a war story. Back in the day I happened to be in the area doing some DA measurements on that very station. This was waaaay back during the really big floods they had out there. As we were finishing up, I was standing in front of that very xmttr during a huge thunderstorm. A trem...
by RGORJANCE
Mon Aug 14, 2017 9:59 am
Forum: AM Radio
Topic: RCA BTA1M transmitter
Replies: 12
Views: 736

Re: RCA BTA1M transmitter

Yup! 833 's will glow red a lot longer than a 4-400. Got an RCA BTA1MX up in Sheboygan with 833's. I think I had to replace the jugs once over many years until we put the Nautel in. It has been in standby for so many years I doubt the CE has even turned it on in about 12-13 years. It might just crat...
by RGORJANCE
Mon Aug 14, 2017 7:01 am
Forum: FM Radio
Topic: 6 KW Transmitter Ballpark price
Replies: 17
Views: 1029

Re: if you have a Nautel, you also get me

For his own well being and good health, keep him out of Wisconsin. Every time he visits here, he gains 10 pounds from eating kringle and bratwurst!

O&H bakery has to add additional temporary help jut to keep up with the kringle demand. :lol: :lol:

Fossil
by RGORJANCE
Fri Aug 11, 2017 6:34 am
Forum: AM Radio
Topic: Gates MW-5 Problem - FOUND IT
Replies: 7
Views: 536

Re: Gates MW-5 Problem

I should have included lower power readings.

At 1,000 watts - these readings are with 100% mod:

IPA I 0.52
EP V 2,575
GRID I 245 ma

2,500 WATTS TPO

IPA 1 .78
EP V 3,700
GRID I 240 ma

Just spotted a note that says grid current must be 225 ma, minimum for power level.

Fossil
by RGORJANCE
Fri Aug 11, 2017 6:24 am
Forum: AM Radio
Topic: Gates MW-5 Problem - FOUND IT
Replies: 7
Views: 536

Re: Gates MW-5 Problem

Here are some typical numbers from an MW-5A factory test data sheet. The A version included the ME-1 modulation enhancer. Xmttr color is black and blue. Earlier MW-5 was a beige grey, and did not have the ME-1. Otherwise, readings for the two should be near the same----they will vary a bit from unit...
by RGORJANCE
Thu Aug 10, 2017 2:48 pm
Forum: AM Radio
Topic: Gates MW-5 Problem - FOUND IT
Replies: 7
Views: 536

Re: Gates MW-5 Problem

I should have read your post a bit closer.......disregard my thoughts, the trouble probably isn't where I was thinking. I will keep scratching my head for other ideas.

Fossil
by RGORJANCE
Thu Aug 10, 2017 2:44 pm
Forum: AM Radio
Topic: Gates MW-5 Problem - FOUND IT
Replies: 7
Views: 536

Re: Gates MW-5 Problem

Can you tell us what plate voltage and plate current are running as the overloads occur, and what they are with the rig running low power? Several possibilities pop into my mind.....damper diode breaking down - possible bad cap/s in the output network - modulator tube shorting out. Been MANY years s...
by RGORJANCE
Sat Aug 05, 2017 7:45 am
Forum: AM Radio
Topic: Fun with Omnitronix
Replies: 9
Views: 893

Re: Fun with Omnitronix

Chuck: The one they stuck me with is really docile, quiet and very well behaved. It's so good sitting there, never gives me any trouble. It is a backup, and the boss said that the fan noise was so annoying that he turned the circuit breaker on the front panel off. And we don't have to feed it. Shows...