Octal sockets are very confusing to me. Using Eagle Cad with a few custom lib's My first socket was a Belton in the large footprint chassis mount, had a PCB made worked OK. Then I wanted a more generic Octal like the cheap Chinese and eBay ones for PCB mount. I grabbed a footprint from a recommended lib on this forum. Well the footprint did not match the socket, the socket was from Amazon and seemed to the "norm" at this point I didn't know whether to look for a different socket to fit, or have the PCB redone to use the sockets I have. So I found a third footprint of Octal s that looks like it will fin my PCB. I guess my question is How the heck many different sockets are there for Octal s and what is considered the norm for PC mount?
Thanks for reading this.
Alan
Thanks for reading this.
Alan
I use GZC8-Y, the dimension is here: https://www.aliexpress.com/item/32304867605.html and
https://www.cricklewoodelectronics.com/Octal-PCB-Gold-Plated-Valve-Holder-Tube-Socket.html
The footprint I used is attached.
GZC8-Y-2 has long pins to suit the PCB board thickness.
https://www.cricklewoodelectronics.com/Octal-PCB-Gold-Plated-Valve-Holder-Tube-Socket.html
The footprint I used is attached.
GZC8-Y-2 has long pins to suit the PCB board thickness.
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Yes, I am pretty sure those are the same sockets I have. From the mid line of the hole in the socket to the tip of the outside pin is 12~mm. The eagle footprint I found, I think it was from 4tube lovers lib file is too small to fit. Looks like I need a different Eagle file.
Thanks
Alan
Stick to Belton, those are more expensive but worth it in the long run. They have mechanical stress relief and the Belton supplied eagle Libs are good.
CMC is also a good brand of sockets, but those suffer from the "Death Grip" on the pins. I made some footprints for those as well some time ago.
CMC is also a good brand of sockets, but those suffer from the "Death Grip" on the pins. I made some footprints for those as well some time ago.
I cant find a Belton in the PCB mount format, only the ones with the chassis mount hardware around them. Any chance someone could measure from the center hole of the socket to the outside pin of a generic octal . My sockets measure 12.57mm . The hole pattern I have for eagle measures 9.67 It seems the generic 8-pin socket is 12.57 but I maybe mistaken.
It's here: https://s3.amazonaws.com/tubedepot-com-production/spree/attached_files/00004280-VT8_ST-PT-PTS.pdf
https://www.digikey.my/en/products/...hopping_Products&utm_term=&productid=10490671
The difference is Belton socket's legs are same distance as tube pin with d=17.2 or 8.5 from centre. The socket leg for GZC8-Y is bent out with wider distance of d=26.5 or r=13.25 from centre. See attached.
https://www.digikey.my/en/products/...hopping_Products&utm_term=&productid=10490671
The difference is Belton socket's legs are same distance as tube pin with d=17.2 or 8.5 from centre. The socket leg for GZC8-Y is bent out with wider distance of d=26.5 or r=13.25 from centre. See attached.
I don't know if you can use this with Eagle, but this is the footprint for the GZC8-Y I use with EasyEDA.
https://easyeda.com/component/6cdde951b2ff471cbfd2491b73a3d9a1
Buy direct from GD-parts - it's cheaper.
https://www.goodcomponent.com/produ...t8865506v65ar4274b-pcb-mount-gzc8-y-1170.html
https://easyeda.com/component/6cdde951b2ff471cbfd2491b73a3d9a1
Buy direct from GD-parts - it's cheaper.
https://www.goodcomponent.com/produ...t8865506v65ar4274b-pcb-mount-gzc8-y-1170.html
Holy smokes, this is exactly what I need, any know how I can convert this to Eagle cad? Mean time I will google it. Thanks much
Import this DXF (rename *.txt to *.dxf) to Eagle.
https://community.element14.com/pro...port-dxf-file-into-eagle-into-sch-or-into-brd
https://community.element14.com/pro...port-dxf-file-into-eagle-into-sch-or-into-brd
Too dang many.
Remember that Octal was about obsolete and forgotten when PCB construction was just getting common. I remember 7-pin PCB radios at the very tail end of tube days, but not an Octal on PCB until a decade+ later when labor costs drove guitar-amps to PCBs. Hand-wired sockets don't need any special pin-placing. In chassis-mount you do want to know where/size your three holes go, but there's less choice, and may be easier to make-do on the production line. (Radios and amplifiers don't generally do gang-punching like car engines do gang-drilling. The Ford 1962 engine has its cylinders spaced the same as the 1932 engine b/c Ford used the same 4-drill machinery and couldn't move the centers.)