Search found 710 matches

by Dale H. Cook
Fri May 26, 2017 10:20 am
Forum: AM Radio
Topic: Contactors!
Replies: 30
Views: 1426

Re: Contactors!

KPJL FM wrote:
Fri May 26, 2017 7:28 am
And don't forget the lock de-icer.
I always have a lock de-icer in the Explorer, but I call mine "propane torch with spreader tip."
by Dale H. Cook
Fri May 26, 2017 6:49 am
Forum: AM Radio
Topic: Contactors!
Replies: 30
Views: 1426

Re: Contactors!Two hats, two pairs of gloves, three pair thermal underwear.....

We have an old Johnson switch- I think actually made by Johnson - which has arthritic joints. I dealt with some of those for a number of years. They were part of a 1947 RCA turnkey build that I took over nearly 50 years later, and Johnson was building RCA's phasors in the late '40s, so they had Joh...
by Dale H. Cook
Thu May 25, 2017 5:59 am
Forum: AM Radio
Topic: Contactors!
Replies: 30
Views: 1426

Re: Contactors!

You lost me at the -40. There are reasons why some of us live south of the Mason-Dixon line. This past winter I had only one significant snowfall, and since the Explorer was parked near the mouth of the driveway in anticipation of the snow I didn't even have to shovel. I got to and from the Explore...
by Dale H. Cook
Wed May 17, 2017 4:36 pm
Forum: AM Radio
Topic: Contactors!
Replies: 30
Views: 1426

Re: Contactors!

One site I worked at in Upper Michigan would hit -20 degrees or worse overnight some winters. That's where I got into the habit of not using any lubricant on the contactors, pretty much anything would get stiff. That is one reason why I use those specific lubricants. Dow Corning Molykote 111 (for t...
by Dale H. Cook
Wed May 17, 2017 7:23 am
Forum: AM Radio
Topic: Collins 820E part
Replies: 2
Views: 204

Re: Collins 820E part

That should be the "Lamp Reset" switch shown in the 820E-1 manual as 266-6806-100 (SPDT). The lens rod and clip should be the same as in the 266-6806-110 (DPDT). The Continental 816R-2B manual that I have a scan of shows the 266-6806-110 used on its front panel, so that same switch must have been us...
by Dale H. Cook
Sat May 13, 2017 5:19 pm
Forum: Everything else
Topic: ADJUSTING CRANK FOR SAT DISH
Replies: 8
Views: 165

Re: ADJUSTING CRANK FOR SAT DISH

The last TVRO dealer in my town was also a vendor for one of the small-satellite-dish systems (I disremember if it was Dish or DirecTV) and expanded into other home entertainment equipment. They have moved, but I have emailed them to see if they have any of the old hardware. Fossil could check with ...
by Dale H. Cook
Sat May 13, 2017 10:02 am
Forum: Everything else
Topic: ADJUSTING CRANK FOR SAT DISH
Replies: 8
Views: 165

Re: ADJUSTING CRANK FOR SAT DISH

kkiddkkidd wrote:
Sat May 13, 2017 9:21 am
Have you talked to a specific person?
No, it has probably been a decade since I last ordered an actuator.
by Dale H. Cook
Sat May 13, 2017 8:19 am
Forum: Everything else
Topic: ADJUSTING CRANK FOR SAT DISH
Replies: 8
Views: 165

Re: ADJUSTING CRANK FOR SAT DISH

It is called an actuator, and DawnCo still sells them.
by Dale H. Cook
Tue May 09, 2017 7:23 am
Forum: Everything else
Topic: PRINTED CIRCUIT BOARD MANU.
Replies: 15
Views: 899

Re: PRINTED CIRCUIT BOARD MANU.

PID_Stop wrote:
Tue May 09, 2017 6:58 am
... very likely, most of us have designed and fabricated them.
I'll second that. I've been designing and fabricating them for about forty years, and I'd wager that some members have been doing so even longer.
by Dale H. Cook
Sat May 06, 2017 6:40 am
Forum: FM Radio
Topic: Dayton AF225 FM Receiver/Monitor
Replies: 4
Views: 758

Re: Dayton AF225 FM Receiver/Monitor

..., meaning this thing is a software defined radio. As Deep pointed out, this is a synthesized receiver, not a SDR - Dayton never made those (I have worked with Dayton products for about 30 years). I have several Dayton manuals, some electronic copies and some scans of physical manuals. None of th...
by Dale H. Cook
Wed Apr 26, 2017 4:26 pm
Forum: FM Radio
Topic: New Sound Board
Replies: 8
Views: 313

Re: New Sound Board

What make and model is your current console? Where are you? One of us might be close enough to come fix it. If it is an older quality console you might be better off fixing it than buying a cheap replacement.
by Dale H. Cook
Wed Apr 26, 2017 8:57 am
Forum: Everything else
Topic: Index to the Receiving Tube Manuals - Fourth Edition
Replies: 0
Views: 73

Index to the Receiving Tube Manuals - Fourth Edition

For those of you who still work on tubed transmitters or any other vacuum tube electronics I have completed and posted the fourth edition of my Index to the Receiving Tube Manuals: http://plymouthcolony.net/starcity/radios/pages/tubeindex.html It includes tube manuals in my collection published trou...
by Dale H. Cook
Wed Apr 12, 2017 11:38 am
Forum: AM Radio
Topic: Collins 310W-1 Exciter Divider
Replies: 2
Views: 277

Collins 310W-1 Exciter Divider

I am trying to figure out what divider ICs were used in the MF version of the Collins 310W-1 exciter (used in the 820E-1 and 820F-1 transmitters). The part number is crossed out in the manual copy that I have access to, which is actually for the HF version which does not use the divider ICs. The par...
by Dale H. Cook
Fri Apr 07, 2017 11:16 am
Forum: AM Radio
Topic: MW10B-A little help?
Replies: 16
Views: 865

Re: MW10B-A little help?

FirebirdTN wrote:
Thu Apr 06, 2017 3:59 pm
Another tip that I picked up from somewhere (can't remember now), was it is almost NEVER the tubes.
That is why I asked "What does the PDM waveform look like?" It is something that you can easily 'scope, and I have sometimes seen PDM problems blamed on tubes by insufficiently experienced engineers.
by Dale H. Cook
Thu Apr 06, 2017 10:30 am
Forum: AM Radio
Topic: MW10B-A little help?
Replies: 16
Views: 865

Re: MW10B-A little help?

What does the PDM waveform look like? It is one of the first things to check in a PDM/PWM transmitter as the duty cycle must be correct for proper transmitter operation.