You dont reading some post here....https://groupdiy.com/threads/wood-racked-2-x-fonia-51-preamps.89001/post-1175835
Pics of electronics things laying around
- Thread starter 13engrsapper
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It was not my post - So I did not see your response. Thanks my friend. How is the transformer building going?
crazydoc
Well-known member
Not bad...ill try winding SE Output Transformers for guitar amp, but with better fraquency respose.
Just in today... One channel not as happy as the other. 1178
boji
Well-known member
This was laying around on the internet. Guess that's cheating.
The trouble is with the red wire
This was laying around on the internet. Guess that's cheating.
Walrus
Well-known member
Now that WOULD be difficult to get in a DB25……
Youngwhisk
Well-known member
I used to splice those. Usually smaller than that though. Many years ago now.
This was laying around on the internet. Guess that's cheating.
I think I lack the patience for that
Brian Roth
Well-known member
Reminds me of an event 40+ years ago when I was living in the Houston metro in an area that was under construction in a large swath of town. One Saturday (Sunday?) I woke up and discovered the landline was dead. I decided to drive and find a payphone to report the outage.
I saw a row of new Ma Bell "green cabinets" in a field that were leveled...found out later a drunk ran off the street. All sorts of REALLY FAT cables and wiring blocks were tossed around the vicinity. Ma Bell crews worked 24/7 for several days resplicing that mess into new green cabinets. I guess that was a major junction for 10000000000 cable pairs that fanned out into the new area of town.
A week or two later, large steel poles were inserted in the ground around the row of cabinets....
Bri
holy crap!
Brian Roth
Well-known member
Yeah...Ma Bell even set up an array of high intensity lights running from a generator so the wiring techs could keep working at night. I guess those guys made a ton of overtime that week!
Bri
Youngwhisk
Well-known member
I only spliced for a couple of years (1976 - 1977). We used Amp tools and connectors. One pair at a time. They were switching to 25 pairs at a time, but I never did any of those. I think a 600 pair cable was the largest I ever did. There were 25 pairs in a bundle and each bundle was colour coded to as many bundles as were needed. Inside each bundle the pair colours were the same as all the other bundles. In the cable vault in the bottom of the central office there were 3000 pair cables. I got to watch them splice those for a little while. Those were separated into bundles but all the pairs in the bundles were the same two colours ( white and white with black I think). The pairs were then identified in the switch room with a "tagging" machine. I never worked with those. All that has now been replaced with fiber optics.
Hey Brian, did you see my post and video of the metal knob 33609 we just got in? On one channel the release is a little wonky at first, it is not audible. I suspect it might be caps in the timing circuit. Just curious if you have had any experience.
Brian Roth
Well-known member
My experience has only been with a few DIY clones that had massive problems. Maybe a problem in the actual meter/metering circuit?
Bri
2000 pair cables are not uncommon in the UK telephone network - and a jointer I know said passers by often stopped to marvel at the work he was doing. A popular question was 'how do you know which wire to connect through?' - to which his answer always was, all you have to do is remember a simple sequence of 2000 different colours......!
Youngwhisk
Well-known member
I spoke to a jointer in London in late 1977. I asked him how much money he was paid. He made half as much as I did and to me it seemed everything cost twice as much in London. I imagine he did not live in the area of London where he was working.
The 2N404 has an Rbb of at least 100 ohms which is not low, but make the input run low enough current and it would be OK for medium impedance circuits. Those repeating blocks are a fun idea too. If there was a supply of NPN germanium transistors languishing in another part of the world it would make it easier to make an actual operational amplifier.
This could be a starting point: https://www.diystompboxes.com/smfforum/index.php?topic=117300.0
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