Tektronix 492 Memory Board For Sale
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Tektronix 492 Memory Board:
This is a memory board from a Tektronix 492 spectrum analyzer. The 492 internal self tests showed a fault in the U2023 ROM on this board, so I replaced the board with a different one. If you have a 492 that is not working due to a firmware failure this board could be helpful in getting it working again, there are several websites that discuss how to replace the older style ROM chips on this board with a 27256 or similar EPROM and loading it with the 492 firmware. Other than the defective U2023 the board appears to be in good condition with the exception of the 12 pin connector at the bottom left which mates with the analyzer motherboard, the green plastic body behind one of the pin sockets is broken due to some solder getting into that particular pin socket which pushed the socket out when the board was installed on the motherboard. I cleaned the solder out and it now does accept the corresponding pin on the motherboard but the pin socket might get pushed up as you insert the board. You can push the pin socket down with a long thin tool, or a better plan would be to replace the connector which will permanently fix that issue. Sold as-is.
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FOR COMBINED SHIPPING IN THE US:
Email me when you are finished shopping and I will send you an invoice with the total cost for shipping. I will combine items for a reduced shipping cost where possible as multiple small items can generally be packed in one box, but large or heavy items might need to be boxed separately. Combined shipping is not available for items that were paid for separately or by not waiting to receive a combined shipping invoice. If you feel that has not calculated the shipping cost properly, then please do not pay until you have received an invoice.
Unless specifically stated otherwise in the item description, all items are sold as-is, with no guarantee of any kind.
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