Read /Write amplifiers in TC11 KL-10 front end
ber...@ami.com.au
front end there is no info about where the R/W amplifiers are located.
The G888 manchester R/W are only optional where external feeds of the
tracks are required. No mention where the normal R/W amps are, but
they must be somewhere because the heads only produce approx 1.2 mV
and this has to be amplified and squared up to the 5 v level.
Anybody know the answer to this question? From noise factor
considerations I would have thought they would be as close to the
heads as possible.
Rolie Baldock.
PEE.
aeolus
Al Kossow
> On reading the manual of the TC11 DECTAPE controller for the KL-10
> front end there is no info about where the R/W amplifiers are located.
They are in the TC11. Normally the controller is mounted just above the
TU56, so the interconnecting cable is less than two feet long.
ber...@ami.com.au
OK OK so what FLIP CHIPS are in the TC11 to do the job? Are they G888
or some other modules? If so what? I need to read off from the TU-56
some DECTAPES without interfering with the KL-10 front end and I need
a board layout for the R/W amplifiers (I have the circuit but why
reinvent the wheel) My major problem is of course the connectors. All
I know is they were made by Amphenol, but they may have been custom
made for DEC. I am not permitted to replace them with other
connectors.
Regards.
Rolie Baldock.
aeolus
Al Kossow
> Hello Al,
>
> OK OK so what FLIP CHIPS are in the TC11 to do the job? Are they G888
> or some other modules? If so what? I need to read off from the TU-56
> some DECTAPES without interfering with the KL-10 front end and I need
> a board layout for the R/W amplifiers (I have the circuit but why
> reinvent the wheel) My major problem is of course the connectors. All
> I know is they were made by Amphenol, but they may have been custom
> made for DEC. I am not permitted to replace them with other
> connectors.
>
They are G888's.
Douglas H. Quebbeman
> Hello Al,
>
> OK OK so what FLIP CHIPS are in the TC11 to do the job? Are they G888
> or some other modules? If so what? I need to read off from the TU-56
> some DECTAPES without interfering with the KL-10 front end and I need
> a board layout for the R/W amplifiers (I have the circuit but why
> reinvent the wheel) My major problem is of course the connectors. All
> I know is they were made by Amphenol, but they may have been custom
> made for DEC. I am not permitted to replace them with other
> connectors.
Are you the one working to bring that PDP-1 back to life in Oz?
Is the task at hand to provide an interface from the PDP-1 to
the TU-56s without hurting in any way the TU-56s' interface to
the KL-10?
Just curious, I wouldn't have any expertise to lend here...
Regards,
-doug q
ber...@ami.com.au
Sorry NO. I have the UNIQUE last UWA PDP-6 monitor sources on DECTAPE
and I need to recover them for the benefit of posterity.
I have on loan the KL-10 front end [under no circumstances to be
butchered] and I need to provide the whole reading and motor drive
equipment to achieve the wanted outcome. What I need more than
anything is the connector which plugs into the read head connector
when it is connected to the skew measuring device.
Regards.
On Fri, 17 May 2002 08:37:58 -0400, "Douglas H. Quebbeman"
<dqueb...@ixnayamspayacm.org> wrote:
><ber...@ami.com.au> wrote in message =
>news:3ce4561...@news.ami.com.au...
>> Hello Al,
>>=20
>> OK OK so what FLIP CHIPS are in the TC11 to do the job? Are they G888
>> or some other modules? If so what? I need to read off from the TU-56
>> some DECTAPES without interfering with the KL-10 front end and I need
>> a board layout for the R/W amplifiers (I have the circuit but why
>> reinvent the wheel) My major problem is of course the connectors. All
>> I know is they were made by Amphenol, but they may have been custom
>> made for DEC. I am not permitted to replace them with other
>> connectors.
>
>Are you the one working to bring that PDP-1 back to life in Oz?
>Is the task at hand to provide an interface from the PDP-1 to
>the TU-56s without hurting in any way the TU-56s' interface to=20
>the KL-10?
>
>Just curious, I wouldn't have any expertise to lend here...
>
>Regards,
>-doug q
>
aeolus
Eric Smith
> I have on loan the KL-10 front end [under no circumstances to be
> butchered] and I need to provide the whole reading and motor drive
> equipment to achieve the wanted outcome. What I need more than
> anything is the connector which plugs into the read head connector
> when it is connected to the skew measuring device.
Why do you need to provide motor drive? The TU56 as configured in
a KL10 front ned has perfectly fine motor drivers. You only need to
provide TTL-level STOP/GO and FORWARD/REVERSE signals. In fact, you don't
really need to provide motor drive at all. Just set the drive to local
control and press the forward button.
If I needed read amps, I think I'd just build the G888 circuit. It's
fairly simple.
Al Kossow
> ber...@ami.com.au writes:
>> I have on loan the KL-10 front end [under no circumstances to be
>> butchered]
>
> fairly simple.
If the TC11 is in the rack YOU HAVE THE G888s!
Just move them to the slots provided for them in the TU56, and you're done
or.. write a program on the PDP11 to dump the blocks using
the TC11.
ber...@ami.com.au
Will think about the manual drive for the TU-56 would certainly save
some software work even though the 2 phase sine-wave motor driver
hardwarealready exists in 3 phase form. Will check out if the KL-10
front end can be safely powered up. I am assured the G888 can be
found in the TC-11 so will unplug it and use the same layout as DEC,
saves rethinking the layout. Still worried about the DECTAPE head
connectors.
Regards,
Rolie.
On 17 May 2002 18:07:34 -0700, Eric Smith
<eric-no-s...@brouhaha.com> wrote:
aeolus
ber...@ami.com.au
There is NO WAY I can get a program into the PDP-11 other than keying
it in from the switches. That is not a realistic option. I don't know
anything about the KL-10 front end, not even how to connect a KSR-33
to it. Moreover the O/S for it would have to be on DECTAPE and I don't
have a copy of that either.
Regards,
Rolie.
aeolus
ber...@ami.com.au
Absolutely correct. Have done that.
Please see other posting for new philosophy to solve this problem.
Regards.
Rolie.
On 17 May 2002 18:10:54 -0700, a...@spies.com (Al Kossow) wrote:
aeolus
Douglas H. Quebbeman
> Hello Al,
>
> There is NO WAY I can get a program into the PDP-11 other than keying
> it in from the switches. That is not a realistic option. I don't know
> anything about the KL-10 front end, not even how to connect a KSR-33
> to it. Moreover the O/S for it would have to be on DECTAPE and I don't
> have a copy of that either.
I've never done this with a PDP-11, but I've painstakingly
toggled a 4k monitor into an IMSAI...
C'mon, this is the very stuff that makes retrocomputing fun!
-dq
Wilber Williams
I have the front-end of our KL here, and it should be complete - if I
can help with a loan of any modules, give me a call. I powered up the
11/40 and it ticks over, unfortunately I haven't got power to the
DECtapes. (That project is lower priority - I've been fixing the
11/34s.)
I could always plug a RL11 & RL01/2 into the 11/40 and load up RT11, and
put DECtape drivers on that...
Wilber
--
Wilber
Associate Director, Networks And Design Services
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