jhalbrecht
Experienced Member
I recently acquired another set of Imsai Calcomp drives and a two board set of an FIF FDC consisting of the FIB and IFM cards as well as all necessary cabling - between the cards, card to rear panel and a ribbon cable from the back of the Imsai to the drive enclosure. I spent a good part of today enhancing my Imsai 8080 page with resources manuals and a couple more images. Trying to gather as much information in one spot.
I call this "The Money Shot" as in way too much money spent on old timey computers I really wanted that FIF set though.
![Imsai Full Stack.jpg Imsai Full Stack.jpg](https://forum.vcfed.org/data/attachments/37/37136-6d9f50e740a76e3ecb2e8e7e6d377b24.jpg)
Hamlin 7521d Solid State Relay
![Hamlin 7521D Electronic Relay.jpg Hamlin 7521D Electronic Relay.jpg](https://forum.vcfed.org/data/attachments/37/37138-3d66324f5d57c6f6fbdcde9368b3bb61.jpg)
I opened up the FDD cabinet and noticed this relay. It's obviously added by a user, I'm wondering if anyone might have an idea why? My guess was to control it remotely perhaps from the computer? Like a tape drive control on a Sol-20... Note the ends of the brown and tan wires on the VDC side. I don't like that they apparently swapped HOT and Neutral between the power cord and power supplies. I'm going to bypass it but I'm curious.
I call this "The Money Shot" as in way too much money spent on old timey computers I really wanted that FIF set though.
![Imsai Full Stack.jpg Imsai Full Stack.jpg](https://forum.vcfed.org/data/attachments/37/37136-6d9f50e740a76e3ecb2e8e7e6d377b24.jpg)
Hamlin 7521d Solid State Relay
![Hamlin 7521D Electronic Relay.jpg Hamlin 7521D Electronic Relay.jpg](https://forum.vcfed.org/data/attachments/37/37138-3d66324f5d57c6f6fbdcde9368b3bb61.jpg)
I opened up the FDD cabinet and noticed this relay. It's obviously added by a user, I'm wondering if anyone might have an idea why? My guess was to control it remotely perhaps from the computer? Like a tape drive control on a Sol-20... Note the ends of the brown and tan wires on the VDC side. I don't like that they apparently swapped HOT and Neutral between the power cord and power supplies. I'm going to bypass it but I'm curious.