Search found 3337 matches

by Deep Thought
Mon Aug 13, 2018 9:03 am
Forum: Radio Studio Engineering
Topic: PC based multi-band processor
Replies: 6
Views: 92

Re: PC based multi-band processor

Try to find a (working) Symetrix AGC and Compressor/Limiter units. Models 422 and 425, IIRC. No PC needed, lower power consumption and easy to hide from prying fingers. Set up well, they'll give you a 'radio' sound without destroying the quality. Problem with that setup is no FM peak limiter, meani...
by Deep Thought
Sun Aug 12, 2018 5:39 pm
Forum: FM Radio
Topic: FM Radio Broadcasting Data System
Replies: 8
Views: 151

Re: FM Radio Broadcasting Data System

Probably just a receiver issue then.
by Deep Thought
Sun Aug 12, 2018 5:00 pm
Forum: Radio Studio Engineering
Topic: PC based multi-band processor
Replies: 6
Views: 92

Re: PC based multi-band processor

Basic StereoTool is 35 euros, but there are some fair-priced options (declipper and advanced dynamics) that make a big difference and still stay well under $500. You'll need at least a quad core i3 to run it well.

https://www.stereotool.com/
by Deep Thought
Sun Aug 12, 2018 4:51 pm
Forum: FM Radio
Topic: FM Radio Broadcasting Data System
Replies: 8
Views: 151

Re: FM Radio Broadcasting Data System

Not everyone runs RDBS. It's an audio subcarrier and has no "signal strength".
by Deep Thought
Thu Aug 09, 2018 8:35 pm
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 805

Re: Capacitor replacement.

If the flasher is mounted on the tower then you can use a three wire lighting choke without violating NEC. One winding, usually the middle, is used as the DC static drain and has no connection to the tower light electric feed. I've seen some which were set up with a three wire choke in this way but ...
by Deep Thought
Wed Aug 08, 2018 12:02 pm
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 805

Re: Capacitor replacement.

A static drain coil will be relatively fine wire (18 ga or smaller) wound on a phenolic or fiberglass tube about 18" long. There will be only one winding and it will terminate on screw terminals at each end. Phasetek's look like this (left, compared to the tower lighting choke on the right): 5b6ae98...
by Deep Thought
Tue Aug 07, 2018 10:29 pm
Forum: FM Radio
Topic: 500w translator
Replies: 9
Views: 344

Re: 500w translator

I doubt that would get far with an inspector. :mrgreen:

One of the things the licensee is supposed to do when a CP or license is issued is check it for errors.
by Deep Thought
Tue Aug 07, 2018 10:27 pm
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 805

Re: Capacitor replacement.

Nathaniel Steele wrote:
Tue Aug 07, 2018 3:18 pm
This is a single tower non D, but it is a combiner.
Not to put too fine a point on it, but the photos show no DC connection from the tower to ground through the lighting choke. If that is indeed the case you need to add a static drain.
by Deep Thought
Sun Aug 05, 2018 11:25 pm
Forum: FM Radio
Topic: 500w translator
Replies: 9
Views: 344

Re: 500w translator

The "director/engineer" got a decimal point out of place when the license application was entered in CDBS and nobody caught it. It's 50 watts according to the CP.
by Deep Thought
Sat Aug 04, 2018 11:28 am
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 805

Re: Capacitor replacement.

On a DA, the value coupled to the tower could sufficiently change the base impedance. The difference between 0.01 uF and 0.02 uF is ~j15 ohms or less at AM broadcast frequencies. Using Phasetek's data these are in series with a coil in the +j1200 ohms or higher range so that amounts to 1.25% or les...
by Deep Thought
Thu Aug 02, 2018 11:53 am
Forum: FM Radio
Topic: Ecreso vs. BW for Translator
Replies: 11
Views: 434

Re: Ecreso vs. BW for Translator

There is a serious misconception that offshore repairs are bad, and take a long time.
It's not a misconception, and you won't have to look far to find someone here who has waited weeks for a repair return. Maybe not from BW today, but it has happened.
by Deep Thought
Thu Aug 02, 2018 11:50 am
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 805

Re: Capacitor replacement.

One other thing...none of those windings is grounded. Is there a separate static drain coil in there? If not, that's why the capacitor popped when lightning got a bit too close.
by Deep Thought
Wed Aug 01, 2018 10:45 am
Forum: FM Radio
Topic: Two soggy Heliax lines!
Replies: 7
Views: 240

Re: Two soggy Heliax lines!

The inside of that line is almost certainly corroded and full of carbonized crap at this point. As noted above, this is a replace, not a repair.
by Deep Thought
Wed Aug 01, 2018 10:42 am
Forum: AM Radio
Topic: Capacitor replacement.
Replies: 23
Views: 805

Re: Capacitor replacement.

The value is not critical. Anything from 0.01 up will work...their job is to equalize the RF potential on the windings on the "hot" end and give an RF path to ground on the "cold" end. The voltage rating is more important, and you might want to up that to 1 KV or higher.
by Deep Thought
Sun Jul 29, 2018 4:49 pm
Forum: Everything else
Topic: WKRP
Replies: 16
Views: 453

Re: WKRP

I've got the amp and the matching tuner. Same thing here...used every day I'm in the office for over 25 years now and just keeps chugging along. :mrgreen: