The "Modern" step by step switch

Have a site with some cool media? Post the links here
Post Reply
User avatar
NECRAT
Site Admin
Posts: 2940
Joined: Sat Nov 17, 2007 9:13 pm
Location: Taunton, MA
Contact:

The "Modern" step by step switch

Post by NECRAT » Sat Aug 27, 2016 5:50 am

Come spend 8 minutes of your time learning how analog phone switches work, with this modern 1951 film!

https://www.youtube.com/watch?v=xZePwin92cI
http://www.necrat.us

"Arguing with an engineer is like mud wrestling with a pig. After a couple of hours, you realize the pig likes it"

User avatar
RGORJANCE
Posts: 1381
Joined: Mon Dec 31, 2007 7:48 am
Location: RACINE, WI

Re: The "Modern" step by step switch

Post by RGORJANCE » Sat Aug 27, 2016 6:31 am

Aaauuugggghhhhh!

That gave me a flashback! 36 weeks of stepping rotary switches, relays, thyratrons, M-28 TTY printers, re-perforators in Air Force tech school in Wichata Falls, TX for "PLAN 55" Automatic Message Handling! Learned how to clean, adjust and troubleshoot all them critters.

Luckily, we got cross trained into a different career field with 14 weeks TDY at Lackland. Never had to work on that beast.

Also, got a tour thru the Tulsa Bell System place in the 50's and got a first hand look-see of those things in live action.

Fossil

User avatar
KPJL FM
Posts: 559
Joined: Fri Nov 16, 2007 9:28 am
Location: planet Earth, 3rd rock from sun

Re: The "Modern" step by step switch

Post by KPJL FM » Mon Aug 29, 2016 9:20 am

Just think of all the copper it took to connect those SxS switches to the christmas trees on the frames! Somebody had to solder those when the CO was installed.
I did a cut-over of a crossbar to ESS back in the seventies. Thankfully, it was a small switch in a rural community.
Trim to fit, paint to match, tune for minimum smoke.

User avatar
RGORJANCE
Posts: 1381
Joined: Mon Dec 31, 2007 7:48 am
Location: RACINE, WI

Re: christmas trees on the frames!

Post by RGORJANCE » Mon Aug 29, 2016 9:58 am

OMG-another flash back! Been there done that, got the T-shirt, hat and coffee cup. Had to wire and solder some of them back in the late 50's at KVOO in Tulsa.

Punch blocks are a lot more fun.

Then got involved in soldering a ton of them in the Air Force. Fortunately it was air conditioned, well lighted and I had a nice comfy chair to sit in. I even had a nice container to set my coffee cup on while I worked. It don't get no better than that!

Ever polish the brass ends on patch cords???

Fossil

User avatar
KPJL FM
Posts: 559
Joined: Fri Nov 16, 2007 9:28 am
Location: planet Earth, 3rd rock from sun

Re: The "Modern" step by step switch

Post by KPJL FM » Mon Aug 29, 2016 1:18 pm

RGORJANCE wrote:Ever polish the brass ends on patch cords???

Fossil
With emery cloth and Brasso.
Trim to fit, paint to match, tune for minimum smoke.

ChuckG
Posts: 914
Joined: Tue Mar 11, 2008 11:12 pm
Location: Moo
Contact:

Re: The "Modern" step by step switch

Post by ChuckG » Mon Aug 29, 2016 11:29 pm

KPJL FM wrote:..... christmas trees......

They're on the list of "Broadcast Equipment I Do Not Miss".
<><><><><><><><><>
Chuck Gennaro
Central Wisconsin

ChuckG
Posts: 914
Joined: Tue Mar 11, 2008 11:12 pm
Location: Moo
Contact:

Re: christmas trees on the frames!

Post by ChuckG » Mon Aug 29, 2016 11:29 pm

RGORJANCE wrote:..... patch cords....

Fossil

So are those. :lol:
<><><><><><><><><>
Chuck Gennaro
Central Wisconsin

User avatar
Dale H. Cook
Posts: 754
Joined: Thu Dec 20, 2007 9:08 am
Location: Roanoke/Lynchburg, VA
Contact:

Re: christmas trees on the frames!

Post by Dale H. Cook » Tue Aug 30, 2016 7:04 am

RGORJANCE wrote:Had to wire and solder some of them back in the late 50's at KVOO in Tulsa.
The last Christmas tree console I had to install was a used McMartin about 1986. I don't recall where the owner picked it up, and it never was one of my favorite consoles, but it beat having the talent do their production in the audition channel in the control room.

I don't go back as far as Fossil with Christmas trees - the first one I worked on was a new RCA BC7-A install about 1971, followed shortly by my overhaul of the board it replaced, a Collins 212E-1, which I installed as the news production board, replacing a 212M-1 which had become a nightmare to keep running.
Dale H. Cook, Contract Engineer, Roanoke/Lynchburg, VA
http://plymouthcolony.net/starcityeng/index.html

ChuckG
Posts: 914
Joined: Tue Mar 11, 2008 11:12 pm
Location: Moo
Contact:

Re: christmas trees on the frames!

Post by ChuckG » Tue Aug 30, 2016 1:20 pm

Dale H. Cook wrote: Collins 212E-1,.
We had the G series over here (Serial #1) which used barrier strips.
<><><><><><><><><>
Chuck Gennaro
Central Wisconsin

User avatar
RGORJANCE
Posts: 1381
Joined: Mon Dec 31, 2007 7:48 am
Location: RACINE, WI

Re: The "Modern" step by step switch

Post by RGORJANCE » Tue Aug 30, 2016 3:15 pm

I am sooooo old that I used to cut acetate commercial discs - two at a time - on a pair of Presto Disc Cutting lathes with Presto cutting heads on them, fed by recording amps with 4-807's driving the heads, all fed by PT-6 Maggies with 10" reel extenders. Actually we didn't use them too often as we had Ampex 300's in the reecording control too.

Fossil

Post Reply