Hi,
My current Tally of "Known" HP 5065A is 120 units!
Cheers,
Corby
Wow, don't know why but more than I expected. I no longer do, but if the
person who I gave it to wants and is on TN can.
-pet
On Fri, Feb 23, 2018 at 6:23 PM, cdelect@juno.com wrote:
Hi,
My current Tally of "Known" HP 5065A is 120 units!
Cheers,
Corby
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Hi
Well, if anybody else is “giving away” 5065’s I’d certainly be willing to “accept”
one :)
Bob
On Feb 23, 2018, at 10:25 PM, Pete Lancashire pete@petelancashire.com wrote:
Wow, don't know why but more than I expected. I no longer do, but if the
person who I gave it to wants and is on TN can.
-pet
On Fri, Feb 23, 2018 at 6:23 PM, cdelect@juno.com wrote:
Hi,
My current Tally of "Known" HP 5065A is 120 units!
Cheers,
Corby
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Hi
Well, if anybody else is “giving away” 5065’s I’d certainly be willing to
“accept”
one :)
Bob
Be careful what you wish for. :) The unit Pete is talking about is a 1969-era model, in nice overall shape but with the usual bad capacitors on the oven controller board. The lamp oven winding should be about 50 ohms cold, but is closer to a dead short. It will take a LOT of work to restore to working condition.
The failed controller ran long enough to smoke a 1.5-ohm 1W resistor, 1N400-something diode, and eventually the 1A line fuse ( http://www.ke5fx.com/5065A_A11_sm.jpg ). Needless to say the lamp PCB looks like something out of Fukushima. It'll need to be rebuilt from scratch after rewinding the heater.
Seriously -- anyone with a 5065A who hasn't checked/replaced the caps on A11, don't let this happen to you. They aren't making any more of these puppies. If the caps on that board are original, don't bother to check them, just replace them, as Luciano suggests at http://www.timeok.it/hp5065a-corner-3/. No need for exotic parts, just put in whatever you have that is somewhere close to the original values.
Not a bad idea to verify the ESR of the new parts you're installing as well.
-- john, KE5FX
Miles Design LLC
There is one on UK ebay at the moment but its not being given away. From the one partial photograph it looks a bit rough.
https://www.ebay.co.uk/itm/HP-5065A-Rubidium-Frequency-Standard/183057846558?
Robert G8RPI.
On 24 February 2018 at 10:02 John Miles <john@miles.io> wrote:
Hi
Well, if anybody else is “giving away” 5065’s I’d certainly be willing to
“accept”
one :)
Bob
Be careful what you wish for. :) The unit Pete is talking about is a 1969-era model, in nice overall shape but with the usual bad capacitors on the oven controller board. The lamp oven winding should be about 50 ohms cold, but is closer to a dead short. It will take a LOT of work to restore to working condition.
The failed controller ran long enough to smoke a 1.5-ohm 1W resistor, 1N400-something diode, and eventually the 1A line fuse ( http://www.ke5fx.com/5065A_A11_sm.jpg ). Needless to say the lamp PCB looks like something out of Fukushima. It'll need to be rebuilt from scratch after rewinding the heater.
Seriously -- anyone with a 5065A who hasn't checked/replaced the caps on A11, don't let this happen to you. They aren't making any more of these puppies. If the caps on that board are original, don't bother to check them, just replace them, as Luciano suggests at http://www.timeok.it/hp5065a-corner-3/. No need for exotic parts, just put in whatever you have that is somewhere close to the original values.
Not a bad idea to verify the ESR of the new parts you're installing as well.
-- john, KE5FX
Miles Design LLC
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It looks rough, there's a cesium standard for sale in the UK, time nuts
member perhaps, that's sat at a quarter of the price, I know which I'd buy.
On 24 Feb 2018 10:46, "George Atkinson via time-nuts" time-nuts@febo.com
wrote:
There is one on UK ebay at the moment but its not being given away. From
the one partial photograph it looks a bit rough.
https://www.ebay.co.uk/itm/HP-5065A-Rubidium-Frequency-
Standard/183057846558?
Robert G8RPI.
On 24 February 2018 at 10:02 John Miles <john@miles.io> wrote:
Hi
Well, if anybody else is “giving away” 5065’s I’d certainly be
willing to
“accept”
one :)
Bob
Be careful what you wish for. :) The unit Pete is talking about is a
1969-era model, in nice overall shape but with the usual bad capacitors on
the oven controller board. The lamp oven winding should be about 50 ohms
cold, but is closer to a dead short. It will take a LOT of work to restore
to working condition.
The failed controller ran long enough to smoke a 1.5-ohm 1W
resistor, 1N400-something diode, and eventually the 1A line fuse (
http://www.ke5fx.com/5065A_A11_sm.jpg ). Needless to say the lamp PCB
looks like something out of Fukushima. It'll need to be rebuilt from
scratch after rewinding the heater.
Seriously -- anyone with a 5065A who hasn't checked/replaced the
caps on A11, don't let this happen to you. They aren't making any more of
these puppies. If the caps on that board are original, don't bother to
check them, just replace them, as Luciano suggests at
http://www.timeok.it/hp5065a-corner-3/. No need for exotic parts, just
put in whatever you have that is somewhere close to the original values.
Not a bad idea to verify the ESR of the new parts you're installing
as well.
-- john, KE5FX
Miles Design LLC
_______________________________________________
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Hi
The “pickup only” part of the deal would be a bit of an issue for some of us :)
Bob
On Feb 24, 2018, at 5:46 AM, George Atkinson via time-nuts time-nuts@febo.com wrote:
There is one on UK ebay at the moment but its not being given away. From the one partial photograph it looks a bit rough.
https://www.ebay.co.uk/itm/HP-5065A-Rubidium-Frequency-Standard/183057846558?
Robert G8RPI.
On 24 February 2018 at 10:02 John Miles <john@miles.io> wrote:
Hi
Well, if anybody else is “giving away” 5065’s I’d certainly be willing to
“accept”
one :)
Bob
Be careful what you wish for. :) The unit Pete is talking about is a 1969-era model, in nice overall shape but with the usual bad capacitors on the oven controller board. The lamp oven winding should be about 50 ohms cold, but is closer to a dead short. It will take a LOT of work to restore to working condition.
The failed controller ran long enough to smoke a 1.5-ohm 1W resistor, 1N400-something diode, and eventually the 1A line fuse ( http://www.ke5fx.com/5065A_A11_sm.jpg ). Needless to say the lamp PCB looks like something out of Fukushima. It'll need to be rebuilt from scratch after rewinding the heater.
Seriously -- anyone with a 5065A who hasn't checked/replaced the caps on A11, don't let this happen to you. They aren't making any more of these puppies. If the caps on that board are original, don't bother to check them, just replace them, as Luciano suggests at http://www.timeok.it/hp5065a-corner-3/. No need for exotic parts, just put in whatever you have that is somewhere close to the original values.
Not a bad idea to verify the ESR of the new parts you're installing as well.
-- john, KE5FX
Miles Design LLC
_______________________________________________
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Old color and a little expensive only one partial pictureBert Kehren
Sent from my Galaxy Tab® A
-------- Original message --------From: Bob kb8tq kb8tq@n1k.org Date: 2/24/18 9:30 AM (GMT-05:00) To: George Atkinson robertg8rpi@virginmedia.com, Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Curious, how many t-nuts have 5065A
Hi
The “pickup only” part of the deal would be a bit of an issue for some of us :)
Bob
On Feb 24, 2018, at 5:46 AM, George Atkinson via time-nuts time-nuts@febo.com wrote:
There is one on UK ebay at the moment but its not being given away. From the one partial photograph it looks a bit rough.
https://www.ebay.co.uk/itm/HP-5065A-Rubidium-Frequency-Standard/183057846558?
Robert G8RPI.
On 24 February 2018 at 10:02 John Miles john@miles.io wrote:
Hi
Well, if anybody else is “giving away” 5065’s I’d certainly be willing to
“accept”
one :)
Bob
Be careful what you wish for. :) The unit Pete is talking about is a 1969-era model, in nice overall shape but with the usual bad capacitors on the oven controller board. The lamp oven winding should be about 50 ohms cold, but is closer to a dead short. It will take a LOT of work to restore to working condition.
The failed controller ran long enough to smoke a 1.5-ohm 1W resistor, 1N400-something diode, and eventually the 1A line fuse ( http://www.ke5fx.com/5065A_A11_sm.jpg ). Needless to say the lamp PCB looks like something out of Fukushima. It'll need to be rebuilt from scratch after rewinding the heater.
Seriously -- anyone with a 5065A who hasn't checked/replaced the caps on A11, don't let this happen to you. They aren't making any more of these puppies. If the caps on that board are original, don't bother to check them, just replace them, as Luciano suggests at http://www.timeok.it/hp5065a-corner-3/. No need for exotic parts, just put in whatever you have that is somewhere close to the original values.
Not a bad idea to verify the ESR of the new parts you're installing as well.
-- john, KE5FX
Miles Design LLC
_______________________________________________
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
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