Search found 1070 matches

by ChuckG
Tue Feb 16, 2021 10:54 pm
Forum: Everything else
Topic: Congrats in order
Replies: 5
Views: 219

Re: Congrats in order

Congratulations Chris, well done!
by ChuckG
Mon Feb 15, 2021 11:21 pm
Forum: AM Radio
Topic: How deep can AM tower ground radials be buried?
Replies: 5
Views: 223

Re: How deep can AM tower ground radials be buried?

Deep enough to protect them from physical damage and theft. They'll work pretty much fine laying on the ground.
by ChuckG
Mon Feb 15, 2021 11:16 pm
Forum: FM Radio
Topic: Elenos ETG 3500 transmitter questions?
Replies: 15
Views: 459

Re: Elenos ETG 3500 transmitter questions?

FWIW, My ETG 5000's (we have 4 and counting now) have one of the 220V leads connected to L1 L2 and L3, the other 220V lead to N1 N2 and N3. Neutral goes nowhere, chassis tied to station ground. I do have the schematic drawings for that transmitter if you need them. BE will provide them if you nag en...
by ChuckG
Sun Feb 14, 2021 10:53 pm
Forum: FM Radio
Topic: Elenos ETG 3500 transmitter questions?
Replies: 15
Views: 459

Re: Elenos ETG 3500 transmitter questions?

So it does run on single phase (connect to L1 and L2 and N1). I just installed an ETG 5000, it does need power to L1 L2 and L3, and Neutrals to N1 N2 N3. It's three separate power supplies. I had to use #12 pigtails back to a junction box. The ground stud on the chassis is completely ridiculous too...
by ChuckG
Wed Feb 10, 2021 1:47 am
Forum: FM Radio
Topic: QEI FMQ-5000 - Pulling my hair out
Replies: 6
Views: 339

Re: QEI FMQ-5000 - Pulling my hair out

double post. It's a skill.
by ChuckG
Wed Feb 10, 2021 1:30 am
Forum: FM Radio
Topic: QEI FMQ-5000 - Pulling my hair out
Replies: 6
Views: 339

Re: QEI FMQ-5000 - Pulling my hair out

That right hand coarse tune is way off for 105.5. It's all the way back! I maintained the 10kW version of that on 104.1 and the right slider was perhaps 2/3 of the way back. They are really picky about that distance, being 1/8" off will keep the transmitter from tuning. Have bob send you a coar...
by ChuckG
Tue Jan 19, 2021 1:40 am
Forum: STL Engineering
Topic: Marti frequency control module temperature
Replies: 4
Views: 636

Re: Marti frequency control module temperature

Well, I cheated and used an Airpax thermal control in line with the runaway heater element. Keeps it at just under 90F. I figure that will be the highest ambient temp it will ever see inside a studio building. If the temp jumps above that I'll have the firemen unplug it. :D The frequency does stay w...
by ChuckG
Sun Jan 10, 2021 12:33 am
Forum: AM Radio
Topic: Gates MO-3759 Diode Rectifier - "DCC. Wire"
Replies: 8
Views: 318

Re: Gates MO-3759 Diode Rectifier - "DCC. Wire"

I posted the same question to an engineering mailing list and got a reply from someone who worked in electronics at a defense plant in the '60s, and while there he was taught that "DCC" means "double cotton covered" - that is undoubtedly correct. SCC- single cotton cover. DCC- d...
by ChuckG
Thu Jan 07, 2021 1:54 pm
Forum: STL Engineering
Topic: Marti frequency control module temperature
Replies: 4
Views: 636

Marti frequency control module temperature

Marti used these in their STL transmitters. Basically a heater module strapped to the crystal with a transistor controlling the heater current. Unfortunately I can't get into the heater module without destroying it and these things are unobtanium from BE. Anyone know roughly how warm/hot these shoul...
by ChuckG
Wed Nov 04, 2020 9:45 pm
Forum: Everything else
Topic: Bought a New LCR Meter
Replies: 7
Views: 681

Re: Bought a New LCR Meter

Thanks, another one to check out. I've been shopping for a more portable replacement for an aging and cranky Sencore.
by ChuckG
Fri Oct 09, 2020 11:21 am
Forum: AM Radio
Topic: Gates BCA250
Replies: 0
Views: 454

Gates BCA250

Looking for a schematic for this.

The BCA250 was a low cost 250W transmitter Gates sold for standby purposes only. It's similar to a 250GY, but there are differences in the
control and a few other circuits.

Anyone have a schematic for one of these old beasts?

Thanks!
by ChuckG
Sun Oct 04, 2020 8:54 pm
Forum: Everything else
Topic: FIELD INTENSITY METER CALIBRATION
Replies: 10
Views: 694

Re: FIELD INTENSITY METER CALIBRATION

kkiddkkidd wrote: Sun Oct 04, 2020 3:13 pm Dan may not even be involved in the business now.

Later,
Last few years it seems I never reach Dan, always someone else. Been wondering if he retired.

So...what are the requirements to calibrate these things?
by ChuckG
Sun Oct 04, 2020 1:17 am
Forum: Everything else
Topic: FIELD INTENSITY METER CALIBRATION
Replies: 10
Views: 694

Re: FIELD INTENSITY METER CALIBRATION

I don't know his current status, but mooretronix used to calibrate those things.
by ChuckG
Mon Sep 28, 2020 7:10 pm
Forum: Everything else
Topic: New SBE Member
Replies: 2
Views: 268

Re: New SBE Member

Thanks Mike! I actually joined back in 1980-ish but let it lapse at some point and never re-upped until this year. I am very good at procrastinating when I get around to it! One nice thing (yeah, I know) to come of this pandemic is that the meetings are held online now. 4 hours driving wasn't workab...
by ChuckG
Wed Sep 16, 2020 10:38 pm
Forum: FM Radio
Topic: Quality translator
Replies: 22
Views: 923

Re: Quality translator

Several other problems with the BW broadcast units: 1. They don't play well with other transmitters on active sites. I own a site that is used for my Class A (3500 watts tpo), plus another Class A running 800 watts--and four translators. Two Gates Air kilowatts, an Ecreso kilowatt and a little 300 ...