On 2023-Apr-22, at 3:53 PM, Peter Coghlan via cctalk wrote:
On 2023-Apr-22, at 1:07 AM, Rob Jarratt via cctalk wrote:
>> This seems to be because I measure a steady 0.6V on pin 6 of the transformer
>> (p4, PSU Sheet 3). I just can't imagine where it might be coming from as the
>> chopper won't
On 4/22/23 17:14, r.stricklin via cctalk wrote:
>
> I can’t say that’s been my experience.
I guess I've led a sheltered life. I will say that some ESDI
controllers do have a bewildering variety of configuration options.
And the Q for the DTC 6280 does confirm your experience.
> On Apr 22, 2023, at 4:44 PM, Chuck Guzis via cctalk
> wrote:
>
> On 4/22/23 15:18, Dennis Boone via cctalk wrote:
>> I think I know the answer to this, but just in case:
>>
>> Is there a way to image ESDI disks other than to hook them up to their
>> usual host controller and use the host?
On 4/22/23 15:18, Dennis Boone via cctalk wrote:
> I think I know the answer to this, but just in case:
>
> Is there a way to image ESDI disks other than to hook them up to their
> usual host controller and use the host? E.g. for MFM, I'd grab the MFM
> Emulator board.
In my experience, you can
>
> This seems to be because I measure a steady 0.6V on pin 6 of the transformer
> (p4, PSU Sheet 3). I just can't imagine where it might be coming from as the
> chopper won't be running. I had previously removed the transformer and there
> are no shorts between the pin 5-pin 6 winding and any of
I have an HP 2875B paper tape drive that I want to interface to. It has
a 50 pin block connector (using well under 1/2 the pins). The connector
manufacturer was Continental.
I have already discovered, the hard way, that it is not a winchester
connector - the pins on the 50 pin Winchester
I think I know the answer to this, but just in case:
Is there a way to image ESDI disks other than to hook them up to their
usual host controller and use the host? E.g. for MFM, I'd grab the MFM
Emulator board.
Cheers,
De
>
> This seems to be because I measure a steady 0.6V on pin 6 of the transformer
> (p4, PSU Sheet 3). I just can't imagine where it might be coming from as the
> chopper won't be running. I had previously removed the transformer and there
> are no shorts between the pin 5-pin 6 winding and any of
My "answering the call of nature" standard reading was EDN. Sadly, it
and Electronic Design are no longer published on dead trees.
--Chuck
Juiced.GS is still publishing, with new a new issue delivered each quarter. I
subscribe and am always happy to see the latest issue delivered to me by the
post office. But I've never seen a copy at a newsstand or book store.
https://juiced.gs/
"Juiced.GS is a quarterly print magazine devoted
Well still in print is
Linux Journal and Linux Format.
Ken
On Sat, Apr 22, 2023, 1:02 AM Tarek Hoteit via cctalk
wrote:
> Funny you mentioned Brave New World. Just two hours ago I bought the book
> at Target. What a coincidence
>
> Regards,
> Tarek Hoteit
>
> > On Apr 21, 2023, at 9:53 PM,
As some of you may be aware I am trying to find a fault in a Rainbow H7842
PSU. I am using Tony Duell's schematic from here
http://www.bitsavers.org/pdf/dec/rainbow/duell_schematics/psu.pdf.
I have been testing the Control Module by using a bench PSU to supply 15VDC
to the input of the 7812
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