atcomsystems.ca/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems No violets?

That's exactly what we used, split 66 blocks. My memories not good enough to tell you all the details. Sam's might be better

Uncle Arthur gave me the idea for the 66 block, but I think I missed some crucial detail. I want to say he told me he used to remove every other row of pins or something to make room. It's been forever and I don't really remember.

Speaking of..... Has anyone seen Mr. Bloom?

He's been scarcer than hen's teeth lately. Hope he's ok.

We use to use a 50 pair 66 block. Here is a picture of the layout. If we had time and it might be needed we would use most of the block. We used mostly those small diodes that I showed on the bottom of the picture. You had to be careful when punching down the ends of the diode that you didn't squash the diode under the punch tool. Try not to make them too tight to the pin.
Where I worked we never used the ringers in the set for common audible. Ours was always 10v buzzers. All our AE sets came without a ringer.



http://s228.photobucket.com/user/Bob3470/media/20181031_114146_zpsxsgsedfq.jpg.html?sort=9&o=1

Yes if you put them on a 6 pin split 50 you could break off the center pins so you had more room for the diode, just couldn't put them on a bracket.

I don't think I've ever seen diodes in that package. I'm used to the 1n4001 type that are roughly the size of a 1/4 watt resistor. Neat!

I never liked the sound of buzzers for ringing. Fine for intercom, but I like the sound of the bells.

It is a tight fit. We used to push the diodes on with long nose pliers and then cut them off with diagonals.

It was easier with 66B blocks then with the M, though they took up more real estate. I knew one guy who would take a 66B-75 block, pop the back off, take out the middle row of pins and then have plenty of room for the diodes.

As I recall, some guys built the blocks for the set, where they put in X number of diodes (1 per line on the phone). The last diode went to the Slate Yellow on the set. Other guys would build the blocks for the line. They would reverse the diodes, and put in X number of diodes, strap the one side together and run that to the RC lead coming out of the 584 panel.

As I recall I usually went the second way, it took up less space and fewer diodes.

BTW - we always used IN4004 diodes. Not sure why, and not sure how I remembered that!

Sam

The 1N400X series of diodes are general purpose rectifier diodes. The last digit, from 1 to 7 indicated it's rated voltage.

1N4001 = 50V
1N4002 = 100V
1N4003 = 200V
1N4004 = 400V
1N4005 = 600V
1N4006 = 800V
1N4007 = 1000V

I found this:

Aha! With ring current at about 100 volts, putting in a 400 volt diode would have been typical phone company practice.

Sam