I have an Altair with the power supply mod and a printed copy of the power supply instructions. I don't think the printed instructions are original. As a matter of fact, I think they are probably printed from deramps's scan. Mr. Ahl's "Saga of a System" mentions both the PS mod and the clock mod although it does not suggest that he ever installed the clock mod. I'd still like to show it at VCF East if possible. Bill S. -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Fred Cisin via cctalk Sent: Thursday, February 20, 2020 8:26 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Parasitic Engineering Altair Clock Fix Kit... On Thu, 20 Feb 2020, William Sudbrink via cctalk wrote: Please let us know what you find. Howard Fullmer created a "beefier" power supply for the Altair. Ed Roberts said that people selling aftermarket peripherals were "parasites", so Howard named his company "Parasitic Engineering". He later produced the "Shuffleboard" (daughterboard) set for TRS80 that changed the memory map to be CP/M compatible, and an adapter (daughterboard) to change the exp-ansion interface to support 8" single density. (4th West Coast Computer Faire 1979) He and George Morrow put out early proposals for standardizing S100. Later, he was chief engineer for Morrow. He is no longer at the same addresses in north Berkeley and Albany. I heard a rumor that he had died, but I have been unable to find more information. George Morrow, who would know, is also dead. -- Grumpy Ol' Fred cisin at xenosoft.com