Search found 161 matches

by mrmodulation
Tue May 03, 2016 1:48 pm
Forum: Ask the Engineers
Topic: CBS Volumax 4000
Replies: 20
Views: 4308

Re: CBS Volumax 4000

Hey deep do you still have the 4000 and 4000A sitting around?
by mrmodulation
Tue Jun 16, 2015 3:34 am
Forum: AM Radio
Topic: 80's AM loudness War
Replies: 29
Views: 2670

Re: 80's AM loudness War

Take a look at these Gates AGC/Limiters on Ebay this guy has been on here selling broadcast processors for a while. Looking at the condition and price makes me wonder if the seller is on drugs :lol: http://www.ebay.com.au/itm/Gates-994-6543-001-Harris-Solid-Statesman-Limiter-Compressor-Vintage-As-Is...
by mrmodulation
Tue Jun 16, 2015 12:09 am
Forum: SW Radio
Topic: RFT - FUNKWERK KOPENICK- / KSA1504 TX
Replies: 1
Views: 3298

Re: RFT - FUNKWERK KOPENICK- / KSA1504 TX

Try These Guys they specialize in SW transmission gear:

http://www.elektrodump.nl/lang-en/1736- ... A1504.html
by mrmodulation
Mon Jun 15, 2015 11:52 pm
Forum: AM Radio
Topic: 80's AM loudness War
Replies: 29
Views: 2670

Re: 80's AM loudness War

Although I have never seen a BL-40 in use at a station I have been watching some videos on youtube showing them in operation. I can honestly say from what I have seen and heard these boxes smash the audio! That's the way I like it dense and loud, There are several after market units based on the BL-...
by mrmodulation
Sun Jun 14, 2015 6:23 am
Forum: AM Radio
Topic: 80's AM loudness War
Replies: 29
Views: 2670

80's AM loudness War

Anybody remember what audio processing and transmitters the "Big Gun" AM stations used back in the day? How high could they push the positive modulation and clipping?
by mrmodulation
Sun Apr 26, 2015 9:15 pm
Forum: AM Radio
Topic: *Three* 833s?
Replies: 9
Views: 1091

Re: *Three* 833s?

As they say a picture says a thousand words...

Clinton
by mrmodulation
Sun Apr 26, 2015 12:26 pm
Forum: Ham Radio
Topic: rigs?
Replies: 11
Views: 3031

Re: rigs?

Hmmm let's see Transceivers: 1 X Yaesu FL-100B 1 X Yaesu FT-200 (early silver face with 7360 balanced modulator) 1 X Yaesu FT-200 (Late black face with transistor modulator board) 1 X Yeasu FT-410B 1 X Yeasu FTDX-560 1 X Yaesu FT-101 2 X Yaesu FT-101B 1 X Yaesu FT-101E 1 X Yaesu FT-101ZD 1 X Yaesu F...
by mrmodulation
Sun Apr 26, 2015 9:41 am
Forum: AM Radio
Topic: *Three* 833s?
Replies: 9
Views: 1091

Re: *Three* 833s?

I tried to take a look at the pic but the link was down, I think fossil is correct though it maybe a 250 watt version of a 1Kw Rig
by mrmodulation
Sun Apr 26, 2015 9:39 am
Forum: AM Radio
Topic: WBMQ 630 AM Savannah GA
Replies: 19
Views: 1979

Re: WBMQ 630 AM Savannah GA

Sadly this isn't the only video I have seen I should post more of these links in the Video section of the site.
by mrmodulation
Sun Apr 26, 2015 1:49 am
Forum: AM Radio
Topic: WBMQ 630 AM Savannah GA
Replies: 19
Views: 1979

WBMQ 630 AM Savannah GA

Whilst searching Youtube for "Abandoned transmitter sites" I found a video of the former WBMQ 630 transmitter shack complete with transmitters, processing gear, antenna monitor ect. It is sad that all this history has been laying around for over 22 years and it should be preserved in a museum :( You...
by mrmodulation
Mon Oct 07, 2013 8:30 am
Forum: Everything else
Topic: Broadcast Equipment Archive
Replies: 6
Views: 1015

Broadcast Equipment Archive

Hello All, After searching the internet and making contact with many people from all walks of life associated with broadcast, audio engineering and AM ham radio I have decided it's time I should get like mined people like you to help collect and share any information about broadcasting gear from the...
by mrmodulation
Mon Oct 07, 2013 8:00 am
Forum: Everything else
Topic: Radio Broadcast Equipment Manuals Wanted
Replies: 10
Views: 1688

Re: Radio Broadcast Equipment Manuals Wanted

Wow you sure have one hell of a collection there Dale,

I have quite a lot of info on RCA and Australian made AWA gear from the 60's, 70's & 80's I can post so I guess I should get this started...

Clinton
VK2FTDX
by mrmodulation
Mon Oct 07, 2013 7:53 am
Forum: AM Radio
Topic: Asymmetrical modulation
Replies: 68
Views: 11855

Re: Asymmetrical modulation

The second picture shows 300% Positive and -95% Negative it sure is Asymmetrical but... :shock: From my experience of maintaining, repairing and building AM BC, SW and HF TX's it looks like the positive modulation may be suffering from several problems including the following: 1. Voltage drop on the...
by mrmodulation
Mon Oct 07, 2013 6:44 am
Forum: AM Radio
Topic: 70's CBS Audio Squash Boxes
Replies: 46
Views: 7850

Re: 70's CBS Audio Squash Boxes

IIRC, LDRs were also used as gain controls in at least one line of automation system, probably IGM (perhaps in the Instacarts? Ha, Ha, Ha Instacarts I have read some posts here about those mechanical monsters. I was just coming into the world when carts ruled automotion and I was lucky to be one of...
by mrmodulation
Mon Oct 07, 2013 6:22 am
Forum: Ham Radio
Topic: Potential newbie...looking for equipment suggestions
Replies: 8
Views: 1408

Re: Potential newbie...looking for equipment suggestions

MMM the BaoFeng UV-5, I own 4 different models of the UV-5's and have sold 20 or more to both hams and CBers (Australia has UHF CB) I purchased my first UV-5 over 3 years ago and from my experience they are a great little radio. I have not had one single unit both mine or ones I have sold fault or g...