Empathy List Archives

MS

Mark Sims

Sun, Dec 18, 2016 10:55 PM

I have a wonky Morian MV-89... probably the well know output cap failure. I wonder if one could pull the crystal out of that and stick in the HP10811? Something tells me Bob would know ;-)

BC

Bob Camp

Mon, Dec 19, 2016 12:13 AM

Hi

Can you pull the crystal? sure.

Does your MV-89 have a 5 MHz crystal (the frequency doubled version) or a 10 MHz crystal? (sub harmonics viewed on a
spectrum analyzer are a really good way to tell).

Is the crystal the same size / pinout? Probably not. HP used an odd package. You might be able to make a spacer.

Will it hit the right frequency? Likely not without changing some parts ….

Bob

On Dec 18, 2016, at 5:55 PM, Mark Sims holrum@hotmail.com wrote:

I have a wonky Morian MV-89... probably the well know output cap failure. I wonder if one could pull the crystal out of that and stick in the HP10811? Something tells me Bob would know ;-)

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Hi Can you pull the crystal? sure. Does your MV-89 have a 5 MHz crystal (the frequency doubled version) or a 10 MHz crystal? (sub harmonics viewed on a spectrum analyzer are a really good way to tell). Is the crystal the same size / pinout? Probably not. HP used an odd package. You might be able to make a spacer. Will it hit the right frequency? Likely not without changing some parts …. Bob > On Dec 18, 2016, at 5:55 PM, Mark Sims <holrum@hotmail.com> wrote: > > I have a wonky Morian MV-89... probably the well know output cap failure. I wonder if one could pull the crystal out of that and stick in the HP10811? Something tells me Bob would know ;-) > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

PS

paul swed

Mon, Dec 19, 2016 12:54 AM

Mark
I tend to agree with you on Bob. But that said the 10811 crystal is a bit
odd.
Its actually a copper cylinder with a screw on top. I believe to insure
correct even heat distribution. There are pix's of it on one of the sights.
Maybe the crystal comes out of the copper.
The 10811 used in the Z3801 is a bit different from standard 10811 in the
tuning sensitivity and I may believe that stability of the steps. But thats
a guess. Some of the sites mention this.
My goal was to simply confirm the rest of the 3801 boards were good and it
is. So I have a spare for my operating 3801. Though it seems to be doing a
fair job as compared to a TBolt I am using as a reference.

I have messed with the bad 10811 checking caps, resitors, and temperature
and its still 50 Hz low. May dive back into that though I have exhausted
pretty much anything thats possible.

Need to clean things up by a lot. Then go searching for the com ports
stalls that sort of started this journey.
Regards
Paul
WB8TSL

On Sun, Dec 18, 2016 at 5:55 PM, Mark Sims holrum@hotmail.com wrote:

I have a wonky Morian MV-89... probably the well know output cap failure.
I wonder if one could pull the crystal out of that and stick in the
HP10811? Something tells me Bob would know ;-)

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.

Mark I tend to agree with you on Bob. But that said the 10811 crystal is a bit odd. Its actually a copper cylinder with a screw on top. I believe to insure correct even heat distribution. There are pix's of it on one of the sights. Maybe the crystal comes out of the copper. The 10811 used in the Z3801 is a bit different from standard 10811 in the tuning sensitivity and I may believe that stability of the steps. But thats a guess. Some of the sites mention this. My goal was to simply confirm the rest of the 3801 boards were good and it is. So I have a spare for my operating 3801. Though it seems to be doing a fair job as compared to a TBolt I am using as a reference. I have messed with the bad 10811 checking caps, resitors, and temperature and its still 50 Hz low. May dive back into that though I have exhausted pretty much anything thats possible. Need to clean things up by a lot. Then go searching for the com ports stalls that sort of started this journey. Regards Paul WB8TSL On Sun, Dec 18, 2016 at 5:55 PM, Mark Sims <holrum@hotmail.com> wrote: > I have a wonky Morian MV-89... probably the well know output cap failure. > I wonder if one could pull the crystal out of that and stick in the > HP10811? Something tells me Bob would know ;-) > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. >

PS

paul swed

Mon, Dec 19, 2016 1:32 AM

Bob
I think Mark was suggesting that. As I explained its a odd package.
Regards
Paul
WB8TSL

On Sun, Dec 18, 2016 at 7:13 PM, Bob Camp kb8tq@n1k.org wrote:

Hi

Can you pull the crystal? sure.

Does your MV-89 have a 5 MHz crystal (the frequency doubled version) or a
10 MHz crystal? (sub harmonics viewed on a
spectrum analyzer are a really good way to tell).

Is the crystal the same size / pinout? Probably not. HP used an odd
package. You might be able to make a spacer.

Will it hit the right frequency? Likely not without changing some parts ….

Bob

On Dec 18, 2016, at 5:55 PM, Mark Sims holrum@hotmail.com wrote:

I have a wonky Morian MV-89... probably the well know output cap

failure. I wonder if one could pull the crystal out of that and stick in
the HP10811? Something tells me Bob would know ;-)

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/

mailman/listinfo/time-nuts

and follow the instructions there.

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.

Bob I think Mark was suggesting that. As I explained its a odd package. Regards Paul WB8TSL On Sun, Dec 18, 2016 at 7:13 PM, Bob Camp <kb8tq@n1k.org> wrote: > Hi > > Can you pull the crystal? sure. > > Does your MV-89 have a 5 MHz crystal (the frequency doubled version) or a > 10 MHz crystal? (sub harmonics viewed on a > spectrum analyzer are a really good way to tell). > > Is the crystal the same size / pinout? Probably not. HP used an odd > package. You might be able to make a spacer. > > Will it hit the right frequency? Likely not without changing some parts …. > > Bob > > > > On Dec 18, 2016, at 5:55 PM, Mark Sims <holrum@hotmail.com> wrote: > > > > I have a wonky Morian MV-89... probably the well know output cap > failure. I wonder if one could pull the crystal out of that and stick in > the HP10811? Something tells me Bob would know ;-) > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. >

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HP Z3801a piezo oscillator does work