Probably explained the early popularity of the 555 timer chip.
JR
old telephone repair
Re: old telephone repair
Cancel the "cancel culture", do not support mob hatred.
Re: old telephone repair
I have run out of justification for throwing more time at this... I have found so many different schematics that I get dizzy.
I did order a brand new $7 phone to put in my bathroom...the wiring will cost more than that new phone.
My inner nerd is dragging feet over trashing this old phone.. to make it a dumb answer only extension, pretty much what it was before I tried to fix it should be relatively simple...
There is a side tone blocking transformer to keep microphone out of ear piece, and hook switch to connect/disconnect to phone line.. But not today, and maybe not this year...
JR
PS: BTW Wayne, my new bar of normal old Dial soap is stinking up my bathroom with perfume... I do not recall dial soap smelling that strong.
I did order a brand new $7 phone to put in my bathroom...the wiring will cost more than that new phone.
My inner nerd is dragging feet over trashing this old phone.. to make it a dumb answer only extension, pretty much what it was before I tried to fix it should be relatively simple...
There is a side tone blocking transformer to keep microphone out of ear piece, and hook switch to connect/disconnect to phone line.. But not today, and maybe not this year...
JR
PS: BTW Wayne, my new bar of normal old Dial soap is stinking up my bathroom with perfume... I do not recall dial soap smelling that strong.
Cancel the "cancel culture", do not support mob hatred.
Re: old telephone repair
Sometimes it's ok to admit defeat.
Right now I am ordering spares for a fisher price toy! After one too many trips to the floor the speaker died. My wife argued for just buying a new toy, but I did point out the speaker was £2 and a new toy £20, so I won that battle just...
Right now I am ordering spares for a fisher price toy! After one too many trips to the floor the speaker died. My wife argued for just buying a new toy, but I did point out the speaker was £2 and a new toy £20, so I won that battle just...
Re: old telephone repair
That is the hardest part... I pride myself on being able to fix almost anything. I can just about guess a schematic for this, not rocket science.
But no longer worth the effort. It looks like the old WE POTS phone platform has been bastardized with so many variants that the same subassemblies get remapped in different ways making terminal labels almost useless.
Like fixing my solar driveway lamp?Right now I am ordering spares for a fisher price toy! After one too many trips to the floor the speaker died. My wife argued for just buying a new toy, but I did point out the speaker was £2 and a new toy £20, so I won that battle just...
Buying a brand new phone cost far less than the used phone and parts to (cough) repair it. I can admit defeat, but its even harder to admit making stupid decisions.
JR
Cancel the "cancel culture", do not support mob hatred.
- mediatechnology
- Posts: 5468
- Joined: Sat Aug 11, 2007 2:34 pm
- Location: Oak Cliff, Texas
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Re: old telephone repair
The side tone transformer is to feed mic audio back into the earpiece to keep people from yelling.There is a side tone blocking transformer to keep microphone out of ear piece
Cell phones don't do side tone and people yell.
The hybrid transformer and its 2 to 4 wire conversion is a magical thing.
If you want to talk about phone phreaking: viewtopic.php?f=12&t=280
I still keep getting cited on Supreme Court Cases. viewtopic.php?f=11&t=279
Re: old telephone repair
I'll take your word for it... I don't need that, or a ringer for a dumb extension set, but nah... That said I still haven't persuaded myself to throw it away, yet. Hopefully it will be on the same junk pile with my old drain pipes. Pickup is still 2 weeks away so I have time to work up to that.mediatechnology wrote: ↑Sun Jan 27, 2019 4:17 amThe side tone transformer is to feed mic audio back into the earpiece to keep people from yelling.There is a side tone blocking transformer to keep microphone out of ear piece
Some people are naturally loud. I can hear people talking on their phone in the parking lot of the food place (I can't call it restaurant) over 100 yards away.Cell phones don't do side tone and people yell.
I need to be gutting that used A/V amp I bought to load my hypex amps into....The hybrid transformer and its 2 to 4 wire conversion is a magical thing.
If you want to talk about phone phreaking: viewtopic.php?f=12&t=280
I still keep getting cited on Supreme Court Cases. viewtopic.php?f=11&t=279
JR
Cancel the "cancel culture", do not support mob hatred.
- mediatechnology
- Posts: 5468
- Joined: Sat Aug 11, 2007 2:34 pm
- Location: Oak Cliff, Texas
- Contact:
Re: old telephone repair
I'm hoping to see that in Build or Pro Audio Design and not the Repair sub-forum.
Half the time I'm not even sure if cell calls are actually full-duplex. It's too easy for people to step on each other. Sometimes I feel like I need to say "over" at the end of a sentence.Almost all land-line (wired and wireless) phones have employed sidetone, so naturally it was an expected convention for cellular telephony but is not standard by any means. Usability experts believe that lack of adequate sidetone causes some people to shout or speak too loudly when using a cell phone (this behavior is sometimes referred to as "cell yell"). https://en.wikipedia.org/wiki/Sidetone
I don't get that effect when I'm using a "wired" POTS phone on the 4G link so its not the network but the SmartPhone handset.
Re: old telephone repair
already started... trying to keep in the correct lanes...mediatechnology wrote: ↑Sun Jan 27, 2019 9:28 amI'm hoping to see that in Build or Pro Audio Design and not the Repair sub-forum.
viewtopic.php?f=6&t=804
JR
Half the time I'm not even sure if cell calls are actually full-duplex. It's too easy for people to step on each other. Sometimes I feel like I need to say "over" at the end of a sentence.Almost all land-line (wired and wireless) phones have employed sidetone, so naturally it was an expected convention for cellular telephony but is not standard by any means. Usability experts believe that lack of adequate sidetone causes some people to shout or speak too loudly when using a cell phone (this behavior is sometimes referred to as "cell yell"). https://en.wikipedia.org/wiki/Sidetone
I don't get that effect when I'm using a "wired" POTS phone on the 4G link so its not the network but the SmartPhone handset.
Cancel the "cancel culture", do not support mob hatred.
Re: old telephone repair
I am about ready to officially clear this off my to-do list... (trash pickup next week).
I will write off the used phone I purchased and replacement keypad that didn't match up, as a stupidity tax that I will pay and learn my lesson.
I just finished installing the brand new chinese $7 phone in my bathroom to answer calls at awkward times (while meditating). This was not part of the original mission but after I repaired my original phone it seemed a good use for repurposed new-old phone number 2. As often happens the simple install took longer and was harder to do than projected.
I already had a hole in the wall from some plastic tubing when I ran outlet water from from my RO filter into the flush tank. (Intersting concept but impractical after I fixed the RO bypass valve that was leaking so much water.)
The too cheap phone extension wire was not trivial to splice after I had to cut it to snake through the hole in the wall.(not trivial either). I ended up having to solder it (tiny stranded wire) back together, but not my best work.
Done... stick a fork in this one.
JR
I will write off the used phone I purchased and replacement keypad that didn't match up, as a stupidity tax that I will pay and learn my lesson.
I just finished installing the brand new chinese $7 phone in my bathroom to answer calls at awkward times (while meditating). This was not part of the original mission but after I repaired my original phone it seemed a good use for repurposed new-old phone number 2. As often happens the simple install took longer and was harder to do than projected.
I already had a hole in the wall from some plastic tubing when I ran outlet water from from my RO filter into the flush tank. (Intersting concept but impractical after I fixed the RO bypass valve that was leaking so much water.)
The too cheap phone extension wire was not trivial to splice after I had to cut it to snake through the hole in the wall.(not trivial either). I ended up having to solder it (tiny stranded wire) back together, but not my best work.
Done... stick a fork in this one.
JR
Cancel the "cancel culture", do not support mob hatred.
Re: old telephone repair
And I finally fitted a new speaker to the fisher price talking toddler piano this evening. See how long it takes her to break it this time