Search found 782 matches

by Dale H. Cook
Fri Feb 23, 2018 2:36 pm
Forum: Ask the Engineers
Topic: 3M/Scotch 66 Block Connector
Replies: 7
Views: 144

Re: 3M/Scotch 66 Block Connector

That kit is no longer on Sandman's site, probably because he is sold out and the connectors are discontinued. Would you consider selling me six of the connectors?
by Dale H. Cook
Fri Feb 23, 2018 8:06 am
Forum: Ask the Engineers
Topic: 3M/Scotch 66 Block Connector
Replies: 7
Views: 144

Re: 3M/Scotch 66 Block Connector

grich wrote:
Thu Feb 22, 2018 10:07 pm
...you basically had to buy a production-run quantity.
These came boxed, perhaps 100 to a box. When I get a chance I'll dig out my diopters and post a couple of photos.
by Dale H. Cook
Thu Feb 22, 2018 8:33 pm
Forum: Ask the Engineers
Topic: 3M/Scotch 66 Block Connector
Replies: 7
Views: 144

Re: 3M/Scotch 66 Block Connector

TPT wrote:
Thu Feb 22, 2018 5:34 pm
Google 3m Scotchlok or IDC (insulation displacement connector). Amazon has several varieties, e.g. 100 for $14.
I had already looked at every Scotchlok connector on Amazon and none are the 66 block connectors. They have been out of production for at least five years, perhaps closer to ten years.
by Dale H. Cook
Thu Feb 22, 2018 5:19 pm
Forum: Ask the Engineers
Topic: 3M/Scotch 66 Block Connector
Replies: 7
Views: 144

3M/Scotch 66 Block Connector

3M once made (but no longer does) a connector, IIRC sold under the Scotch or Scotcklok brand. It would crimp onto a wire much the same as the Scotchlok splices used by telco installers, but it would push onto a single terminal of a 66 block. I haven't been able to find them in any of my catalogs (bu...
by Dale H. Cook
Thu Feb 22, 2018 7:29 am
Forum: Ham Radio
Topic: CBS LABS Dynamic Presence Equalizer model 450
Replies: 1
Views: 64

Re: CBS LABS Dynamic Presence Equalizer model 450

I have never seen a manual for the 450 (original model, 2RUs) or 4500 (later model, 1RU). The principle use of the Dynamic Presence Equalizer was to improve the sound of the human voice when transmitted over a less-than-optimal path, such as an unequalized phone line with poor high frequency respons...
by Dale H. Cook
Thu Feb 15, 2018 9:22 pm
Forum: On-Air Studios
Topic: Where to find used equipment?
Replies: 7
Views: 189

Re: Where to find used equipment?

Bill DeFelice wrote:
Thu Feb 15, 2018 7:54 pm
... but I ended up getting a larger Dynamax for my personal studio.
I get away with just a workstation, since all I am doing is producing a weekly music program and doing occasional promos and PSAs.

Image
by Dale H. Cook
Thu Feb 15, 2018 7:28 am
Forum: AM Radio
Topic: Audio Bandwidth of an AM Broadcast Station
Replies: 9
Views: 491

Re: Audio Bandwidth of an AM Broadcast Station

Never mind that with a FM translator, station owners have no motivating reason to care about their AM audio quality. I have one client who has applied for a translator to complement their flea-power night signal. It will cover relatively little of their 5 kW day signal so they are very keen on keep...
by Dale H. Cook
Wed Feb 14, 2018 9:23 am
Forum: Radio Studio Engineering
Topic: Software to control Broadcast Tools 8x2 Audio Switcher
Replies: 7
Views: 302

Re: Software to control Broadcast Tools 8x2 Audio Switcher

Does it look like this?

Image

If so the manual is on the BT site. I always automated control of them from automation systems.
by Dale H. Cook
Wed Feb 14, 2018 9:16 am
Forum: On-Air Studios
Topic: Where to find used equipment?
Replies: 7
Views: 189

Re: Where to find used equipment?

My go-to for used equipment is Steve Scarborough at Bay Country Broadcast in Baltimore. I have been dealing with Steve for most of 20 years. I recently bought a Symetrix 528E from him that shows no sign of use and has definitely never been mounted in a rack. There are also a couple of broadcast equi...
by Dale H. Cook
Thu Jan 25, 2018 7:36 am
Forum: General Computers
Topic: USB Keyboards/Mice for Studio
Replies: 5
Views: 265

Re: USB Keyboards/Mice for Studio

DO NOT use more than one wireless keyboard/mouse in the same studio! For years I have run multiple Logitech devices with their Unifying software in the house without conflict (I sometimes have as many as four computers running at once). I think the key is to set them up one at a time with only one ...
by Dale H. Cook
Thu Jan 11, 2018 9:12 am
Forum: FM Radio
Topic: Harris FM K5 Freq Change
Replies: 18
Views: 684

Re: Harris FM K5 Freq Change

The PA tuning is fairly straightforward but the usual problem are is getting the driver matched to the grid on the PA. On the 10 and 20 there is some "bend tuning" involved. I was involved in the field retuning of a 20H3, which, IIRC, used the same cavity as the 20K. We had a Harris field tech come...
by Dale H. Cook
Wed Jan 10, 2018 2:56 pm
Forum: AM Radio
Topic: What is this? A 5 kw Dummy Load or what?
Replies: 22
Views: 2411

Re: What is this? A 5 kw Dummy Load or what?

ncradioeng wrote:
Wed Jan 10, 2018 1:43 pm
I was told the the 51.5 ohm value came from early RCA rigid coax line that was made from standard copper water pipe sizes.
That is correct, and all of my oldest broadcast catalogs show 51.5 Ohms as the standard antenna, line and termination value.
by Dale H. Cook
Tue Jan 09, 2018 9:15 am
Forum: AM Radio
Topic: What is this? A 5 kw Dummy Load or what?
Replies: 22
Views: 2411

Re: What is this? A 5 kw Dummy Load or what?

COMMENG wrote:
Mon Jan 08, 2018 10:51 am
The "resistive" strip appears to have come from an older Gates BC-1T or similar vintage vacuum tube transmitter.
I agree - I have a BC-1T load here and it appears identical. Bear in mind that a BC-1T load is not a 50 ohm load - it is a 51.5 ohm load.
by Dale H. Cook
Sun Dec 31, 2017 9:25 am
Forum: Internet Streaming
Topic: Getting Through Windows Firewall
Replies: 4
Views: 160

Getting Through Windows Firewall

I have a customer with a secondary transmitter site out of listening range, and I want to set up a private WME stream so staff can dial in and hear how the off-air audio sounds. My problem is configuring Windows Firewall (under Win7) to allow inbound access to the pull the stream. I've never worked ...
by Dale H. Cook
Sun Dec 31, 2017 9:17 am
Forum: FM Radio
Topic: Wanted reliable monitor amp
Replies: 11
Views: 482

Re: Wanted reliable monitor amp

kcbooboo wrote:
Sun Dec 31, 2017 7:26 am
The Crown D-75 or D-75A amps can be found cheap. Once you replace ...
I concur with Bob. At the moment I have one third in line in the shop queue for a customer.