I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
Thank you,
Mitch
:
:I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
:
:It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
:
:If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
:
:Thank you,
:
:Mitch
:
The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
::
::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
::
::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
::
::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
::
::Thank you,
::
::Mitch
::
: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
:
I will reassemble the led board and check for good connections.
Mitch
:::
:::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
:::
:::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
:::
:::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
:::
:::Thank you,
:::
:::Mitch
:::
:: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
::
:I will reassemble the led board and check for good connections.
:
:Mitch
The X-ref is an NTE 3078....Lot cheaper than 30 bucks even if you have to pay extra for shipping such a small part.
Lewis
::::
::::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
::::
::::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
::::
::::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
::::
::::Thank you,
::::
::::Mitch
::::
::: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
:::
::I will reassemble the led board and check for good connections.
::
::Mitch
:
:The X-ref is an NTE 3078....Lot cheaper than 30 bucks even if you have to pay extra for shipping such a small part.
:Lewis
:
:
I appreciate the help.
Thank you all,
Mitch
FYI: The NTE3078 can be had at www.mouser.com. The Mouser number is 526-NTE3078. The part is less than 4 dollars US. Mouser has no minimum order amount.
Clifton
:::::Hello all,
:::::
:::::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
:::::
:::::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
:::::
:::::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
:::::
:::::Thank you,
:::::
:::::Mitch
:::::
:::: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
::::
:::I will reassemble the led board and check for good connections.
:::
:::Mitch
::
::The X-ref is an NTE 3078....Lot cheaper than 30 bucks even if you have to pay extra for shipping such a small part.
::Lewis
::
::
:I appreciate the help.
:
:Thank you all,
:
:Mitch
:
|
::::::Hello all, ::::: ::::Mitch :::
:Mitch,
:
:FYI: The NTE3078 can be had at www.mouser.com. The Mouser number is 526-NTE3078. The part is less than 4 dollars US. Mouser has no minimum order amount.
:
:Clifton
:
:
::::::
::::::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
::::::
::::::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
::::::
::::::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
::::::
::::::Thank you,
::::::
::::::Mitch
::::::
::::: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
::::I will reassemble the led board and check for good connections.
::::
:::
:::The X-ref is an NTE 3078....Lot cheaper than 30 bucks even if you have to pay extra for shipping such a small part.
:::Lewis
:::
::I appreciate the help.
::
::Thank you all,
::
::Mitch
::
:
:
:
: : : :  : : : : : : : :Sir Mitch. . . . . : : :Consider yourself lucky that display didn't happen to be using one of the family that T.I. DID pioneer, and it consisted of a decade counter, display latch AND the expected display LED, but with having ALL of those functions being included within one small chips housing. : : :Now I would expect that some of THOSE particular units might be demanding that higher dollar figure nowadays. : : :Another consideration is something that you might check out on the unit, and since you are having a drop out of some segments, confirm which ones they are. : : :Additionally I don't have the specs on that Sencore unit, but am expecting it to be either a 50 - 100 or 150 Meg counter, and probably not going on up into the 200 Meg ethereal threshold.. : : :Or if so . . . . you're very infrequently or ever measuring those upper freqs. : : :My thought is to for you to now confirm that the "quirky" display is NOT having problems with either its B and C segments. : : :FIO . . . A display is identified by assigning the very top segment . . . of its frontal view . . . as A and then go clockwise around the unit and fill in the B-C-D-E-F segments and the G will be the cross bar segment in the center. : : :What you then look into is if you can swap out the first display digit in the counter, with the "quirky" display digit so that the counters 1st digit is then not even aware of a problem, since it never has to display other than the B-C segments (for the digit "1") if it only needs to count up to 199 megs. : : :Check it out . . . : : : : : : : :73's de Edd : : :  : |
:
:
:
:
::Mitch,
::
::FYI: The NTE3078 can be had at www.mouser.com. The Mouser number is 526-NTE3078. The part is less than 4 dollars US. Mouser has no minimum order amount.
::
::Clifton
::
::
:
:::::::Hello all,
:::::::
:::::::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
:::::::
:::::::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
:::::::
:::::::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
:::::::
:::::::Thank you,
:::::::
:
:
:
:::::::Mitch
:::::::
:::::: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
:
:
:
::::::
:::::I will reassemble the led board and check for good connections.
:::::
:
:
:
:::::Mitch
::::
::::The X-ref is an NTE 3078....Lot cheaper than 30 bucks even if you have to pay extra for shipping such a small part.
::::Lewis
::::
:
:
:
::::
:::I appreciate the help.
:::
:::Thank you all,
:::
:::Mitch
:::
::
::
:
:
Edd,
Thanks for the post, i surely understand what you are saying.
Check your email, i have sent one to you.
Mitch
:
:FYI: The NTE3078 can be had at www.mouser.com. The Mouser number is 526-NTE3078. The part is less than 4 dollars US. Mouser has no minimum order amount.
:
:Clifton
:
:
::::::Hello all,
::::::
::::::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
::::::
::::::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
::::::
::::::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
::::::
::::::Thank you,
::::::
::::::Mitch
::::::
::::: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
:::::
::::I will reassemble the led board and check for good connections.
::::
::::Mitch
:::
:::The X-ref is an NTE 3078....Lot cheaper than 30 bucks even if you have to pay extra for shipping such a small part.
:::Lewis
:::
:::
::I appreciate the help.
::
::Thank you all,
::
::Mitch
::
:
:
Thanks Clifton, i will get a couple of them for future also.
Mitch
::
::FYI: The NTE3078 can be had at www.mouser.com. The Mouser number is 526-NTE3078. The part is less than 4 dollars US. Mouser has no minimum order amount.
::
::Clifton
::
::
:::::::Hello all,
:::::::
:::::::I have this frequency counter with the manual and schematic. It works very well. Over time one of the seven segment led's has lost two segments and i want to replace it.
:::::::
:::::::It is a Texas Instruments part # TIL 321P. I can find some reference to it as data sheets and some suppliers that will only give me a quote for volume purchases, one on ebay wanted $30.00 for one.
:::::::
:::::::If anyone has this LED or a direct replacement i would be interested. Other suggestions are welcome.
:::::::
:::::::Thank you,
:::::::
:::::::Mitch
:::::::
:::::: The LED itself may be OK. I've found cracked solder joints or poor connrctions between the driver and the LED to cause this. Does pushing or wiggling bring back the segments?
::::::
:::::I will reassemble the led board and check for good connections.
:::::
:::::Mitch
::::
::::The X-ref is an NTE 3078....Lot cheaper than 30 bucks even if you have to pay extra for shipping such a small part.
::::Lewis
::::
::::
:::I appreciate the help.
:::
:::Thank you all,
:::
:::Mitch
:::
::
::
:Thanks Clifton, i will get a couple of them for future also.
:
:Mitch
:
Thanks to everyone that replied,
I did purchase two new LED's just in case. I resoldered all of the solder connections on the LED and the 7447 driver along with the grounds. It has been working perfect over 72 hours now with self tests, power ups and downs and connected to a signal generator switched on and off many times and passing new self tests. One of the posters suggested this, goes to show that patience pays off.
Moving on to my RF-1 that Warren has been helping me with, may post something about it when it is fixed, have the upmost confidence and respect for Warren.
Love this Forum,
Be safe all, use isolation transformers,
Mitch