Re: Commodore Pet 8032 keyboard repair - conductive or capacitive?

On Mon, Jun 5, 2017 at 7:35 PM, Ray Arachelian wrote: > On 06/05/2017 11:40 AM, Ethan Dicks wrote: >> The power connectors on many PETs are burned - the current draw is a >> bit much for the connector so oxidation happens which increases >> resistance which adds heat and the

Re: Serial keyboards

On 6/5/17 3:12 PM, Henry Bond via cctalk wrote: > the same price for the keyboard as the terminal is greedy. Welcome to the world of the keyboard collector, who buys up keyboards and leaves terminals and classic computers behind, rendering them useless.

Re: Serial keyboards

Hi Henry, what's your ultimate goal? I imagine you'll have a better selection if you perform some simply protocol translation on a microcontroller, perhaps USB->serial. =] -- Anders Nelson +1 (517) 775-6129 www.erogear.com On Mon, Jun 5, 2017 at 2:52 PM, Henry Bond via cctalk

Serial keyboards

I have been looking around the Internet for a good resource on serial keyboards and have found that I have come up against something of a brick wall, I have found this device Look at this on eBay http://www.ebay.co.uk/itm/112428059043. So list, which keyboards are your favourite, which feel

Re: Motorola SDA7 Dual Transistor

On 6/5/17 2:06 PM, Brent Hilpert via cctalk wrote: > I checked several Moto databooks from 1969 into the 70s last night and didn't > find it. (Not to suggest my checking is the last word). > SDA7 is not a 'standard' Motorola-style number. > Might have been a custom order. > > the 1972 books

Re: Motorola SDA7 Dual Transistor

> On 6/4/17 5:44 PM, Michael Thompson via cctalk wrote: >> I am trying to LTSpice simulate a DEC H-724 power supply from a PDP-12. It >> includes a Motorola SDA7 dual transistor. I can find any information on >> this part. Anyone have any info? On 2017-Jun-05, at 12:38 PM, Al Kossow via cctalk

Re: Motorola SDA7 Dual Transistor

I have the three volume moto transistor catalog from 1973 coming, it should have it in vol 3 On 6/4/17 5:44 PM, Michael Thompson via cctalk wrote: > I am trying to LTSpice simulate a DEC H-724 power supply from a PDP-12. It > includes a Motorola SDA7 dual transistor. I can find any information

Re: Commodore Pet 8032 keyboard repair - conductive or capacitive?

On Sun, Jun 4, 2017 at 5:43 PM, Ray Arachelian via cctalk wrote: > I have a pair of 8032 Pets. One of them has a short on the motherboard > that causes the fuse to blow whenever it's turned on - looks like its > previous owner tried to repair it as the power connector is a

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

> On Jun 5, 2017, at 10:33 AM, P Gebhardt via cctalk > wrote: > >> ... >> The platters can be replaced with ones from the single-platter IBM 2315 (ie. >> RK05) and use similar head technology which is pretty rugged. > > Yes, I kept the disk packs. However, I guess that

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

Hello Al, >> The surfaces of the disk packs of type 9871 or 871 that came with it where >> corroded and are not usable anymore. > >Did you keep them? > >The platters can be replaced with ones from the single-platter IBM 2315 (ie. >RK05) and use similar head technology which is pretty rugged.

Re: I hadn't made the connection before

On 2 June 2017 at 17:13, Cameron Kaiser via cctalk wrote: > The (ridiculous) story of the Keyboard Component was legendary. The ECS > keyboard variant can barely be considered functional even by the standards > of the time, though I guess it at least looks decent compared

Re: RK11-D print set

Al, Thanks for putting the pdf version of the RK11-D docs on bitsavers. I was having trouble printing the tiff versions. Marc Howard On Sun, Jun 4, 2017 at 10:04 AM, Al Kossow via cctalk wrote: > weird I would have missed that, it's the most common unibus disk

Re: Commodore Pet 8032 keyboard repair - conductive or capacitive?

Commodore didn't use any capacitive keyboards on 6502-based computers. That would have taken extra electronics and cost more. I don't know whether any of the Amiga keyboards were capacitive, but I suspect not.