Re: [time-nuts] Rubidium freq standard - temperature

[paul swed]

With some humor as I looked inside my egg I had replaced the caps also. So
it is a common failure.
Also note the chip is not a micro but an array or at least a state machine.
Regards
Paul
WB8TSL

On Thu, Nov 30, 2017 at 8:47 PM, paul swed  wrote:

> Will forward tomorrow. Yes I recall my lamp voltage is also very good.
>
> On Thu, Nov 30, 2017 at 8:41 PM, Jerry Hancock  wrote:
>
>> Paul, send whatever you have to clist  at
>> hanler (without the D) dot com
>>
>> Also, the caps we replaced were only 4 electrolytics.  3 x 470uf 25v and
>> a 270uf at 16V.  I used a 330uf 25v for the later.
>>
>> I’ve seen them for like $30 Canadian.  I think they are inexpensive due
>> to the failure of the caps, no rs232,  no docs, etc.  I get great lamp
>> voltage on mine, all over 10V if that says anything.  They seem stable but
>> I don’t have the test setup needed or much to compare them to except my
>> GPSDOs.  I hope to have a Cesium standard by end of year and I am building
>> the TPLL test set.  But it seemed like there was some decent work done on
>> the physics package.  Looks like it was all assembled by hand, then
>> taped-up, sealed twice and clamped.
>>
>> Thanks.
>>
>> Jerry
>>
>> > On Nov 30, 2017, at 5:24 PM, paul swed  wrote:
>> >
>> > Jerry
>> > I have some dribs and drabs of details on the units I have. Happy to
>> send
>> > whatever I have to you directly. Suspect its to large for FEBO. What I
>> can
>> > tell is they must have been considered quite good and for military use.
>> I
>> > haven't run mine alot because I was concerned about the temp like you.
>> Nor
>> > have I really dug in. They just worked from day one.
>> > Granted maybe better if I look at the caps. The good thing about the
>> unit
>> > is the connector is clearly labeled with the pin functions. So I was
>> able
>> > to operate them right out of the hamfest. As I recall these were very
>> very
>> > inexpensive.
>> > Regards
>> > Paul
>> > WB8TSL
>> >
>> > On Thu, Nov 30, 2017 at 8:04 PM, Jerry Hancock 
>> wrote:
>> >
>> >> Paul, The units Gilbert gave me were TS-RFS.  They are fairly large.
>> The
>> >> physics end is about 5”x2”x2" and overall length about 9”.  They lock
>> >> pretty quickly now that I’ve replace the caps.  They can drive 50ohms
>> >> pretty hard, outputting a square wave.  I’m thinking of bolting on some
>> >> fins to the physics end. Just two points: 1) it would be nice to dial
>> them
>> >> in closer; and 2) I wish I had equipment to test them more
>> accurately.  I’m
>> >> working on building one of the Tight PLL test sets to solve #2.
>> Gilbert
>> >> suggested we look to see if we could tap into the field current
>> somehow to
>> >> set the frequency more accurately.
>> >>
>> >>
>> >>> On Nov 30, 2017, at 3:44 PM, paul swed  wrote:
>> >>>
>> >>> Jerry
>> >>> You have some EG RBs. Thats great news. Now I am not alone. I have 2
>> >> also
>> >>> that work. I have found little details on them.
>> >>> That said I believe they are intended to be mounted on a heat sink.
>> One
>> >> end
>> >>> surely looks like that whats would be done.
>> >>> I believe mine are LCR-10-T. Might have to double check that.
>> >>> Regards
>> >>> Paul
>> >>> WB8TSL
>> >>>
>> >>> On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock 
>> wrote:
>> >>>
>>  I was able to get all 5 of these EG Rubidium Frequency Standards
>> >> running
>>  by replacing the caps as another member found.  They have a large
>> >> heatsink
>>  on them, no fins, and are running at 43C.  Is that too hot?  Should I
>> >> bolt
>>  them down to a larger heatsink?  They consume a little over 9w after
>> >> they
>>  lock, about double that while warming up.
>> 
>>  The only other issue I see is that the 8bit frequency setting doesn’t
>>  allow me to set the frequency closer than 5E-11.  I don’t know if
>> this
>> >> is
>>  good for these units and RFS in general or not.
>> 
>>  Thanks.
>> 
>>  Jerry
>> 
>>  [/begin buttkissing]
>> 
>>  PS:  I have learned quite a bit from this group in the past couple of
>>  months.  John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a
>> lot
>> >> of
>>  help and have added a lot of enjoyment to my hobby.
>> 
>>  [/end buttkissing]
>> 
>>  ___
>>  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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Re: [time-nuts] Rubidium freq standard - temperature

[paul swed]

hello to the group
OK turns out my egg units are actually the same ts-frs sn1599.
Nice lable thats says what the pin functions are.

1 rf rtn
2 rf
3 rf rtn
4 +24 1.5A cold says my note
5 +24 rtn
6 +24 power same as 4
7 sig rtn
8 reg mon
9 sig rtn
10 lock
11 sig rtn
12 dc light
13 sig rtn
14 xtal mon
15 power rtn
16 + 5 note says .3A constant

No RS 232 apparent and I have not gone inside to look. Maybe later today.
But believe as others this is sort of pre-rs-232. Also no apparent EFC
control.
Regards
Paul.
WB8TSL


On Fri, Dec 1, 2017 at 12:39 AM, Mark Sims  wrote:

> I doubt that it would be a direct mapping to a 9-pin serial connector.
> And probably would not be outputting anything unless prompted.  It might be
> useful to scope the pins and see if anything looks like serial data.  Even
> if it has a serial port, without some kind of manual, it is probably
> useless.
>
> If it not  RS-232 compatible voltage tolerant and you connect a +/- V
> RS-232 signal into it you could burn something out.
>
> ---
>
> > I opened it up, JT1 has 9 pins. What are the odds? I think I have to
> hook something up to it and see if there is anything on 2 or 3, no?
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Re: [time-nuts] Rubidium freq standard - temperature

[Bob kb8tq]

Hi

Back a while ago EG decided they needed a new name. The connection of the
company name to various pieces of history was believed to be an issue. Back then
they were actively buying up various companies. When they bought Perkin Elmer, 
they decided to use that name for the new company. I used to drive past the 
(now 
empty) Perkin Elmer HQ building on my way to work. 

Tracking much of anything down at the company (regardless of the name) is a bit 
crazy. You need to go to the division involved with the work and see if they 
have
the info you are after. 

These Rb’s were designed as FRK / M-100 clones back in the 1980’s. Back then, 
the idea of serial control was not as pervasive as it is today. They may well 
have
been redesigned in the 1990’s or even later. If so, the marketing guys didn’t 
have 
much of an advertising budget ….

Bob

> On Dec 1, 2017, at 12:54 AM, Jerry Hancock  wrote:
> 
> Mark, I agree.  I tried scoping some pins.  I see a few different levels and 
> one pin has what looks like a clock signal with a period of about 4.2ms.  
> Other than that, hard to tell without a manual.
> 
> I know people went so far as to contact Perkin Elmer without luck, I had 
> heard they had acquired EG
> 
> I wouldn’t mind sending one to someone that could do a better test on it.  
> I’ll play around with them if and when I get the TPLL setup working. 
> 
> 
>> On Nov 30, 2017, at 9:39 PM, Mark Sims  wrote:
>> 
>> I doubt that it would be a direct mapping to a 9-pin serial connector.  And 
>> probably would not be outputting anything unless prompted.  It might be 
>> useful to scope the pins and see if anything looks like serial data.  Even 
>> if it has a serial port, without some kind of manual, it is probably useless.
>> 
>> If it not  RS-232 compatible voltage tolerant and you connect a +/- V RS-232 
>> signal into it you could burn something out.
>> 
>> ---
>> 
>>> I opened it up, JT1 has 9 pins. What are the odds? I think I have to hook 
>>> something up to it and see if there is anything on 2 or 3, no?
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Re: [time-nuts] Rubidium freq standard - temperature

[Hal Murray]

je...@hanler.com said:
> I tried scoping some pins.  I see a few different levels and one pin has
> what looks like a clock signal with a period of about 4.2ms.  Other than
> that, hard to tell without a manual.

Some devices print out version info and such at power up.  If you are willing 
to power cycle one, you might learn something by putting a scope on a pin 
when you power cycle it.

You can probably tell input pins from output pins by connecting a pin to 
ground or power through a 10 K resistor.  (That's assuming that one of  the 
output pins is high so you can tell what power is.  Or just guess 5V since 
it's old enough.  Or poke around to see what you find.)

-- 
These are my opinions.  I hate spam.



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Re: [time-nuts] Rubidium freq standard - temperature

[Jerry Hancock]

Mark, I agree.  I tried scoping some pins.  I see a few different levels and 
one pin has what looks like a clock signal with a period of about 4.2ms.  Other 
than that, hard to tell without a manual.

I know people went so far as to contact Perkin Elmer without luck, I had heard 
they had acquired EG

I wouldn’t mind sending one to someone that could do a better test on it.  I’ll 
play around with them if and when I get the TPLL setup working. 


> On Nov 30, 2017, at 9:39 PM, Mark Sims  wrote:
> 
> I doubt that it would be a direct mapping to a 9-pin serial connector.  And 
> probably would not be outputting anything unless prompted.  It might be 
> useful to scope the pins and see if anything looks like serial data.  Even if 
> it has a serial port, without some kind of manual, it is probably useless.
> 
> If it not  RS-232 compatible voltage tolerant and you connect a +/- V RS-232 
> signal into it you could burn something out.
> 
> ---
> 
>> I opened it up, JT1 has 9 pins. What are the odds? I think I have to hook 
>> something up to it and see if there is anything on 2 or 3, no?
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[time-nuts] Rubidium freq standard - temperature

[Mark Sims]

I doubt that it would be a direct mapping to a 9-pin serial connector.  And 
probably would not be outputting anything unless prompted.  It might be useful 
to scope the pins and see if anything looks like serial data.  Even if it has a 
serial port, without some kind of manual, it is probably useless.

If it not  RS-232 compatible voltage tolerant and you connect a +/- V RS-232 
signal into it you could burn something out.

---

> I opened it up, JT1 has 9 pins. What are the odds? I think I have to hook 
> something up to it and see if there is anything on 2 or 3, no?
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Re: [time-nuts] Rubidium freq standard - temperature

[Jerry Hancock]

I opened it up, JT1 has 9 pins. What are the odds? I think I have to hook 
something up to it and see if there is anything on 2 or 3, no?

> On Nov 30, 2017, at 7:35 PM, Jerry Hancock  wrote:
> 
> I see a jack labeled JT1.  It has about 8 pins I remember.  I wonder...
> 
> 
>> On Nov 30, 2017, at 7:11 PM, Mark Sims  wrote:
>> 
>> A lot Rb's from that era have TTL level serial interfaces that can drive 
>> most RS-232 ports directly.  The PRS-10, SRO100, and LPFRS are examples.
>> ___
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Re: [time-nuts] Rubidium freq standard - temperature

[Jerry Hancock]

I see a jack labeled JT1.  It has about 8 pins I remember.  I wonder...


> On Nov 30, 2017, at 7:11 PM, Mark Sims  wrote:
> 
> A lot Rb's from that era have TTL level serial interfaces that can drive most 
> RS-232 ports directly.  The PRS-10, SRO100, and LPFRS are examples.
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[time-nuts] Rubidium freq standard - temperature

[Mark Sims]

A lot Rb's from that era have TTL level serial interfaces that can drive most 
RS-232 ports directly.  The PRS-10, SRO100, and LPFRS are examples.
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Re: [time-nuts] Rubidium freq standard - temperature

[paul swed]

Will forward tomorrow. Yes I recall my lamp voltage is also very good.

On Thu, Nov 30, 2017 at 8:41 PM, Jerry Hancock  wrote:

> Paul, send whatever you have to clist  at hanler
> (without the D) dot com
>
> Also, the caps we replaced were only 4 electrolytics.  3 x 470uf 25v and a
> 270uf at 16V.  I used a 330uf 25v for the later.
>
> I’ve seen them for like $30 Canadian.  I think they are inexpensive due to
> the failure of the caps, no rs232,  no docs, etc.  I get great lamp voltage
> on mine, all over 10V if that says anything.  They seem stable but I don’t
> have the test setup needed or much to compare them to except my GPSDOs.  I
> hope to have a Cesium standard by end of year and I am building the TPLL
> test set.  But it seemed like there was some decent work done on the
> physics package.  Looks like it was all assembled by hand, then taped-up,
> sealed twice and clamped.
>
> Thanks.
>
> Jerry
>
> > On Nov 30, 2017, at 5:24 PM, paul swed  wrote:
> >
> > Jerry
> > I have some dribs and drabs of details on the units I have. Happy to send
> > whatever I have to you directly. Suspect its to large for FEBO. What I
> can
> > tell is they must have been considered quite good and for military use. I
> > haven't run mine alot because I was concerned about the temp like you.
> Nor
> > have I really dug in. They just worked from day one.
> > Granted maybe better if I look at the caps. The good thing about the unit
> > is the connector is clearly labeled with the pin functions. So I was able
> > to operate them right out of the hamfest. As I recall these were very
> very
> > inexpensive.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Thu, Nov 30, 2017 at 8:04 PM, Jerry Hancock  wrote:
> >
> >> Paul, The units Gilbert gave me were TS-RFS.  They are fairly large.
> The
> >> physics end is about 5”x2”x2" and overall length about 9”.  They lock
> >> pretty quickly now that I’ve replace the caps.  They can drive 50ohms
> >> pretty hard, outputting a square wave.  I’m thinking of bolting on some
> >> fins to the physics end. Just two points: 1) it would be nice to dial
> them
> >> in closer; and 2) I wish I had equipment to test them more accurately.
> I’m
> >> working on building one of the Tight PLL test sets to solve #2.  Gilbert
> >> suggested we look to see if we could tap into the field current somehow
> to
> >> set the frequency more accurately.
> >>
> >>
> >>> On Nov 30, 2017, at 3:44 PM, paul swed  wrote:
> >>>
> >>> Jerry
> >>> You have some EG RBs. Thats great news. Now I am not alone. I have 2
> >> also
> >>> that work. I have found little details on them.
> >>> That said I believe they are intended to be mounted on a heat sink. One
> >> end
> >>> surely looks like that whats would be done.
> >>> I believe mine are LCR-10-T. Might have to double check that.
> >>> Regards
> >>> Paul
> >>> WB8TSL
> >>>
> >>> On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock 
> wrote:
> >>>
>  I was able to get all 5 of these EG Rubidium Frequency Standards
> >> running
>  by replacing the caps as another member found.  They have a large
> >> heatsink
>  on them, no fins, and are running at 43C.  Is that too hot?  Should I
> >> bolt
>  them down to a larger heatsink?  They consume a little over 9w after
> >> they
>  lock, about double that while warming up.
> 
>  The only other issue I see is that the 8bit frequency setting doesn’t
>  allow me to set the frequency closer than 5E-11.  I don’t know if this
> >> is
>  good for these units and RFS in general or not.
> 
>  Thanks.
> 
>  Jerry
> 
>  [/begin buttkissing]
> 
>  PS:  I have learned quite a bit from this group in the past couple of
>  months.  John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a lot
> >> of
>  help and have added a lot of enjoyment to my hobby.
> 
>  [/end buttkissing]
> 
>  ___
>  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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> >> mailman/listinfo/time-nuts
> >>> and follow the instructions there.
> >>
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> >> and follow the instructions there.
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>
> 

Re: [time-nuts] Rubidium freq standard - temperature

[Jerry Hancock]

Paul, send whatever you have to clist  at hanler 
(without the D) dot com

Also, the caps we replaced were only 4 electrolytics.  3 x 470uf 25v and a 
270uf at 16V.  I used a 330uf 25v for the later.

I’ve seen them for like $30 Canadian.  I think they are inexpensive due to the 
failure of the caps, no rs232,  no docs, etc.  I get great lamp voltage on 
mine, all over 10V if that says anything.  They seem stable but I don’t have 
the test setup needed or much to compare them to except my GPSDOs.  I hope to 
have a Cesium standard by end of year and I am building the TPLL test set.  But 
it seemed like there was some decent work done on the physics package.  Looks 
like it was all assembled by hand, then taped-up, sealed twice and clamped.

Thanks.  

Jerry

> On Nov 30, 2017, at 5:24 PM, paul swed  wrote:
> 
> Jerry
> I have some dribs and drabs of details on the units I have. Happy to send
> whatever I have to you directly. Suspect its to large for FEBO. What I can
> tell is they must have been considered quite good and for military use. I
> haven't run mine alot because I was concerned about the temp like you. Nor
> have I really dug in. They just worked from day one.
> Granted maybe better if I look at the caps. The good thing about the unit
> is the connector is clearly labeled with the pin functions. So I was able
> to operate them right out of the hamfest. As I recall these were very very
> inexpensive.
> Regards
> Paul
> WB8TSL
> 
> On Thu, Nov 30, 2017 at 8:04 PM, Jerry Hancock  wrote:
> 
>> Paul, The units Gilbert gave me were TS-RFS.  They are fairly large.  The
>> physics end is about 5”x2”x2" and overall length about 9”.  They lock
>> pretty quickly now that I’ve replace the caps.  They can drive 50ohms
>> pretty hard, outputting a square wave.  I’m thinking of bolting on some
>> fins to the physics end. Just two points: 1) it would be nice to dial them
>> in closer; and 2) I wish I had equipment to test them more accurately.  I’m
>> working on building one of the Tight PLL test sets to solve #2.  Gilbert
>> suggested we look to see if we could tap into the field current somehow to
>> set the frequency more accurately.
>> 
>> 
>>> On Nov 30, 2017, at 3:44 PM, paul swed  wrote:
>>> 
>>> Jerry
>>> You have some EG RBs. Thats great news. Now I am not alone. I have 2
>> also
>>> that work. I have found little details on them.
>>> That said I believe they are intended to be mounted on a heat sink. One
>> end
>>> surely looks like that whats would be done.
>>> I believe mine are LCR-10-T. Might have to double check that.
>>> Regards
>>> Paul
>>> WB8TSL
>>> 
>>> On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock  wrote:
>>> 
 I was able to get all 5 of these EG Rubidium Frequency Standards
>> running
 by replacing the caps as another member found.  They have a large
>> heatsink
 on them, no fins, and are running at 43C.  Is that too hot?  Should I
>> bolt
 them down to a larger heatsink?  They consume a little over 9w after
>> they
 lock, about double that while warming up.
 
 The only other issue I see is that the 8bit frequency setting doesn’t
 allow me to set the frequency closer than 5E-11.  I don’t know if this
>> is
 good for these units and RFS in general or not.
 
 Thanks.
 
 Jerry
 
 [/begin buttkissing]
 
 PS:  I have learned quite a bit from this group in the past couple of
 months.  John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a lot
>> of
 help and have added a lot of enjoyment to my hobby.
 
 [/end buttkissing]
 
 ___
 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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>> 
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Re: [time-nuts] Rubidium freq standard - temperature

[Jerry Hancock]

1) Model number is TS-RFS and they vary for series from A to H, assuming the 
series is linear as I only have 5 of them.
2) No manual.
3) There is an 8 bit dip switch with a maximum range of about 10mhz and a step 
of .39mhz. I might have these off by a factor of 10 but I was able to set two 
of mine to within 5E-11.  The dip is located near a micro of some kind but it 
is a resistive binary ladder that could be just positioned there.  If it is 
setting current then it would be easy to dial it closer I believe.
4) I don’t see a place for an RS232 output nor recognize any of the usual 
suspect drivers.


> On Nov 30, 2017, at 4:49 PM, Mark Sims  wrote:
> 
> 43C seems reasonable for the baseplate temperature.
> 
> What is the model number for these?   Do you have a manual?   How are you 
> setting the frequency?I just got in a Spectratime SRO100 and am adding 
> support for it to Lady Heather.   I may also do the LPFRS which may be 
> related to yours.
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Re: [time-nuts] Rubidium freq standard - temperature

[paul swed]

Jerry
I have some dribs and drabs of details on the units I have. Happy to send
whatever I have to you directly. Suspect its to large for FEBO. What I can
tell is they must have been considered quite good and for military use. I
haven't run mine alot because I was concerned about the temp like you. Nor
have I really dug in. They just worked from day one.
Granted maybe better if I look at the caps. The good thing about the unit
is the connector is clearly labeled with the pin functions. So I was able
to operate them right out of the hamfest. As I recall these were very very
inexpensive.
Regards
Paul
WB8TSL

On Thu, Nov 30, 2017 at 8:04 PM, Jerry Hancock  wrote:

> Paul, The units Gilbert gave me were TS-RFS.  They are fairly large.  The
> physics end is about 5”x2”x2" and overall length about 9”.  They lock
> pretty quickly now that I’ve replace the caps.  They can drive 50ohms
> pretty hard, outputting a square wave.  I’m thinking of bolting on some
> fins to the physics end. Just two points: 1) it would be nice to dial them
> in closer; and 2) I wish I had equipment to test them more accurately.  I’m
> working on building one of the Tight PLL test sets to solve #2.  Gilbert
> suggested we look to see if we could tap into the field current somehow to
> set the frequency more accurately.
>
>
> > On Nov 30, 2017, at 3:44 PM, paul swed  wrote:
> >
> > Jerry
> > You have some EG RBs. Thats great news. Now I am not alone. I have 2
> also
> > that work. I have found little details on them.
> > That said I believe they are intended to be mounted on a heat sink. One
> end
> > surely looks like that whats would be done.
> > I believe mine are LCR-10-T. Might have to double check that.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock  wrote:
> >
> >> I was able to get all 5 of these EG Rubidium Frequency Standards
> running
> >> by replacing the caps as another member found.  They have a large
> heatsink
> >> on them, no fins, and are running at 43C.  Is that too hot?  Should I
> bolt
> >> them down to a larger heatsink?  They consume a little over 9w after
> they
> >> lock, about double that while warming up.
> >>
> >> The only other issue I see is that the 8bit frequency setting doesn’t
> >> allow me to set the frequency closer than 5E-11.  I don’t know if this
> is
> >> good for these units and RFS in general or not.
> >>
> >> Thanks.
> >>
> >> Jerry
> >>
> >> [/begin buttkissing]
> >>
> >> PS:  I have learned quite a bit from this group in the past couple of
> >> months.  John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a lot
> of
> >> help and have added a lot of enjoyment to my hobby.
> >>
> >> [/end buttkissing]
> >>
> >> ___
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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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> mailman/listinfo/time-nuts
> > and follow the instructions there.
>
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Re: [time-nuts] Rubidium freq standard - temperature

[Jerry Hancock]

Paul, The units Gilbert gave me were TS-RFS.  They are fairly large.  The 
physics end is about 5”x2”x2" and overall length about 9”.  They lock pretty 
quickly now that I’ve replace the caps.  They can drive 50ohms pretty hard, 
outputting a square wave.  I’m thinking of bolting on some fins to the physics 
end. Just two points: 1) it would be nice to dial them in closer; and 2) I wish 
I had equipment to test them more accurately.  I’m working on building one of 
the Tight PLL test sets to solve #2.  Gilbert suggested we look to see if we 
could tap into the field current somehow to set the frequency more accurately.


> On Nov 30, 2017, at 3:44 PM, paul swed  wrote:
> 
> Jerry
> You have some EG RBs. Thats great news. Now I am not alone. I have 2 also
> that work. I have found little details on them.
> That said I believe they are intended to be mounted on a heat sink. One end
> surely looks like that whats would be done.
> I believe mine are LCR-10-T. Might have to double check that.
> Regards
> Paul
> WB8TSL
> 
> On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock  wrote:
> 
>> I was able to get all 5 of these EG Rubidium Frequency Standards running
>> by replacing the caps as another member found.  They have a large heatsink
>> on them, no fins, and are running at 43C.  Is that too hot?  Should I bolt
>> them down to a larger heatsink?  They consume a little over 9w after they
>> lock, about double that while warming up.
>> 
>> The only other issue I see is that the 8bit frequency setting doesn’t
>> allow me to set the frequency closer than 5E-11.  I don’t know if this is
>> good for these units and RFS in general or not.
>> 
>> Thanks.
>> 
>> Jerry
>> 
>> [/begin buttkissing]
>> 
>> PS:  I have learned quite a bit from this group in the past couple of
>> months.  John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a lot of
>> help and have added a lot of enjoyment to my hobby.
>> 
>> [/end buttkissing]
>> 
>> ___
>> 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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[time-nuts] Rubidium freq standard - temperature

[Mark Sims]

43C seems reasonable for the baseplate temperature.

What is the model number for these?   Do you have a manual?   How are you 
setting the frequency?I just got in a Spectratime SRO100 and am adding 
support for it to Lady Heather.   I may also do the LPFRS which may be related 
to yours.
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Re: [time-nuts] Rubidium freq standard - temperature

[paul swed]

Jerry
You have some EG RBs. Thats great news. Now I am not alone. I have 2 also
that work. I have found little details on them.
That said I believe they are intended to be mounted on a heat sink. One end
surely looks like that whats would be done.
I believe mine are LCR-10-T. Might have to double check that.
Regards
Paul
WB8TSL

On Thu, Nov 30, 2017 at 6:22 PM, Jerry Hancock  wrote:

> I was able to get all 5 of these EG Rubidium Frequency Standards running
> by replacing the caps as another member found.  They have a large heatsink
> on them, no fins, and are running at 43C.  Is that too hot?  Should I bolt
> them down to a larger heatsink?  They consume a little over 9w after they
> lock, about double that while warming up.
>
> The only other issue I see is that the 8bit frequency setting doesn’t
> allow me to set the frequency closer than 5E-11.  I don’t know if this is
> good for these units and RFS in general or not.
>
> Thanks.
>
> Jerry
>
> [/begin buttkissing]
>
> PS:  I have learned quite a bit from this group in the past couple of
> months.  John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a lot of
> help and have added a lot of enjoyment to my hobby.
>
> [/end buttkissing]
>
> ___
> 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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[time-nuts] Rubidium freq standard - temperature

[Jerry Hancock]

I was able to get all 5 of these EG Rubidium Frequency Standards running by 
replacing the caps as another member found.  They have a large heatsink on 
them, no fins, and are running at 43C.  Is that too hot?  Should I bolt them 
down to a larger heatsink?  They consume a little over 9w after they lock, 
about double that while warming up.

The only other issue I see is that the 8bit frequency setting doesn’t allow me 
to set the frequency closer than 5E-11.  I don’t know if this is good for these 
units and RFS in general or not.

Thanks.

Jerry

[/begin buttkissing]

PS:  I have learned quite a bit from this group in the past couple of months.  
John Miles, Gilbert, Mark Sims, Bob, etc, etc have been a lot of help and have 
added a lot of enjoyment to my hobby.  

[/end buttkissing]

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