Empathy List Archives

SW

Skip Withrow

Sun, Aug 1, 2021 7:56 PM

Hello Time-Nuts,

I am giving away a General Radio 1115-C 5Mhz Standard Frequency
Oscillator for a friend. All I ask is the cost of shipping, or it can
be picked up in Denver, CO.

Unit comes with a manual (you can view it on KO4BB.com or BAMA boat
anchor site), one GR874 to BNC adapter, MIL accessory connector for
24V and EFC input, and IEC power cord.

Crystal is a Bliley BG61A-5 (AT cut). Oscillator uses a copper oven
inside glass dewar, all foamed-in-place in an aluminum box that plugs
into the main chassis. I have verified that the oven is on
temperature (76.4C indicated on xtal). The oscillator was way low and
I changed a couple of caps to bring it back in range. The dead NiMH
backup battery has been removed. The power connector has been changed
to an IEC type.

After about 5 weeks the drift is 5.5x10E-10/day and still falling.
So, it does not currently meet the 1115-C spec, but does come close to
the 1115-B spec (but who knows how long this unit has been in
storage).

Good beginner unit. There is external EFC control, so could be used
to build a GPSDO. Unit is 3U rack mount and weighs about 32 pounds.

If interested please contact me off line at the above address.

Thanks,
Skip Withrow

Hello Time-Nuts, I am giving away a General Radio 1115-C 5Mhz Standard Frequency Oscillator for a friend. All I ask is the cost of shipping, or it can be picked up in Denver, CO. Unit comes with a manual (you can view it on KO4BB.com or BAMA boat anchor site), one GR874 to BNC adapter, MIL accessory connector for 24V and EFC input, and IEC power cord. Crystal is a Bliley BG61A-5 (AT cut). Oscillator uses a copper oven inside glass dewar, all foamed-in-place in an aluminum box that plugs into the main chassis. I have verified that the oven is on temperature (76.4C indicated on xtal). The oscillator was way low and I changed a couple of caps to bring it back in range. The dead NiMH backup battery has been removed. The power connector has been changed to an IEC type. After about 5 weeks the drift is 5.5x10E-10/day and still falling. So, it does not currently meet the 1115-C spec, but does come close to the 1115-B spec (but who knows how long this unit has been in storage). Good beginner unit. There is external EFC control, so could be used to build a GPSDO. Unit is 3U rack mount and weighs about 32 pounds. If interested please contact me off line at the above address. Thanks, Skip Withrow

BK

Bob kb8tq

Sun, Aug 1, 2021 11:07 PM

Hi

Based on the one I have here, if it’s been off “a while” it could easily take
6 months to settle in. The good news is that after a year or so it should do
quite well.

Bob

On Aug 1, 2021, at 3:56 PM, Skip Withrow skip.withrow@gmail.com wrote:

Hello Time-Nuts,

I am giving away a General Radio 1115-C 5Mhz Standard Frequency
Oscillator for a friend. All I ask is the cost of shipping, or it can
be picked up in Denver, CO.

Unit comes with a manual (you can view it on KO4BB.com or BAMA boat
anchor site), one GR874 to BNC adapter, MIL accessory connector for
24V and EFC input, and IEC power cord.

Crystal is a Bliley BG61A-5 (AT cut). Oscillator uses a copper oven
inside glass dewar, all foamed-in-place in an aluminum box that plugs
into the main chassis. I have verified that the oven is on
temperature (76.4C indicated on xtal). The oscillator was way low and
I changed a couple of caps to bring it back in range. The dead NiMH
backup battery has been removed. The power connector has been changed
to an IEC type.

After about 5 weeks the drift is 5.5x10E-10/day and still falling.
So, it does not currently meet the 1115-C spec, but does come close to
the 1115-B spec (but who knows how long this unit has been in
storage).

Good beginner unit. There is external EFC control, so could be used
to build a GPSDO. Unit is 3U rack mount and weighs about 32 pounds.

If interested please contact me off line at the above address.

Thanks,
Skip Withrow

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

Hi Based on the one I have here, if it’s been off “a while” it could easily take 6 months to settle in. The good news is that after a year or so it should do quite well. Bob > On Aug 1, 2021, at 3:56 PM, Skip Withrow <skip.withrow@gmail.com> wrote: > > Hello Time-Nuts, > > I am giving away a General Radio 1115-C 5Mhz Standard Frequency > Oscillator for a friend. All I ask is the cost of shipping, or it can > be picked up in Denver, CO. > > Unit comes with a manual (you can view it on KO4BB.com or BAMA boat > anchor site), one GR874 to BNC adapter, MIL accessory connector for > 24V and EFC input, and IEC power cord. > > Crystal is a Bliley BG61A-5 (AT cut). Oscillator uses a copper oven > inside glass dewar, all foamed-in-place in an aluminum box that plugs > into the main chassis. I have verified that the oven is on > temperature (76.4C indicated on xtal). The oscillator was way low and > I changed a couple of caps to bring it back in range. The dead NiMH > backup battery has been removed. The power connector has been changed > to an IEC type. > > After about 5 weeks the drift is 5.5x10E-10/day and still falling. > So, it does not currently meet the 1115-C spec, but does come close to > the 1115-B spec (but who knows how long this unit has been in > storage). > > Good beginner unit. There is external EFC control, so could be used > to build a GPSDO. Unit is 3U rack mount and weighs about 32 pounds. > > If interested please contact me off line at the above address. > > Thanks, > Skip Withrow > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.

JF

John Franke

Sun, Aug 1, 2021 11:36 PM

I would be very interested in providing a home, with power, for the oscillator.

John M. Franke WA4WDL
400Ibis C.
Portsmouth, VA 23703

jmfranke@cox.net

On August 1, 2021 at 3:56 PM Skip Withrow skip.withrow@gmail.com wrote:

Hello Time-Nuts,

I am giving away a General Radio 1115-C 5Mhz Standard Frequency
Oscillator for a friend. All I ask is the cost of shipping, or it can
be picked up in Denver, CO.

Unit comes with a manual (you can view it on KO4BB.com or BAMA boat
anchor site), one GR874 to BNC adapter, MIL accessory connector for
24V and EFC input, and IEC power cord.

Crystal is a Bliley BG61A-5 (AT cut). Oscillator uses a copper oven
inside glass dewar, all foamed-in-place in an aluminum box that plugs
into the main chassis. I have verified that the oven is on
temperature (76.4C indicated on xtal). The oscillator was way low and
I changed a couple of caps to bring it back in range. The dead NiMH
backup battery has been removed. The power connector has been changed
to an IEC type.

After about 5 weeks the drift is 5.5x10E-10/day and still falling.
So, it does not currently meet the 1115-C spec, but does come close to
the 1115-B spec (but who knows how long this unit has been in
storage).

Good beginner unit. There is external EFC control, so could be used
to build a GPSDO. Unit is 3U rack mount and weighs about 32 pounds.

If interested please contact me off line at the above address.

Thanks,
Skip Withrow

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

I would be very interested in providing a home, with power, for the oscillator. John M. Franke WA4WDL 400Ibis C. Portsmouth, VA 23703 jmfranke@cox.net > On August 1, 2021 at 3:56 PM Skip Withrow <skip.withrow@gmail.com> wrote: > > > Hello Time-Nuts, > > I am giving away a General Radio 1115-C 5Mhz Standard Frequency > Oscillator for a friend. All I ask is the cost of shipping, or it can > be picked up in Denver, CO. > > Unit comes with a manual (you can view it on KO4BB.com or BAMA boat > anchor site), one GR874 to BNC adapter, MIL accessory connector for > 24V and EFC input, and IEC power cord. > > Crystal is a Bliley BG61A-5 (AT cut). Oscillator uses a copper oven > inside glass dewar, all foamed-in-place in an aluminum box that plugs > into the main chassis. I have verified that the oven is on > temperature (76.4C indicated on xtal). The oscillator was way low and > I changed a couple of caps to bring it back in range. The dead NiMH > backup battery has been removed. The power connector has been changed > to an IEC type. > > After about 5 weeks the drift is 5.5x10E-10/day and still falling. > So, it does not currently meet the 1115-C spec, but does come close to > the 1115-B spec (but who knows how long this unit has been in > storage). > > Good beginner unit. There is external EFC control, so could be used > to build a GPSDO. Unit is 3U rack mount and weighs about 32 pounds. > > If interested please contact me off line at the above address. > > Thanks, > Skip Withrow > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.

time-nuts@lists.febo.com

GR 1115-C free to good home