Empathy List Archives

BC

Bob Camp

Wed, Feb 15, 2017 12:36 PM

Hi

The link gives an error, but I have no doubt that the meaning of the term varies a bit.
Thanks for the reference. I’ll try to get it working from here.

Bob

On Feb 15, 2017, at 2:28 AM, Robert Atkinson via time-nuts time-nuts@febo.com wrote:

Hi,Sorry if I caused confusion by calling the SCR/BC221 a wavemeter. Clearly it's not in the wider usage of the term, and the manual and front panel call it a frequency meter. However the similar British device was called a wavemeter "Wavemeter Class D" http://www.vmarsmanuals.co.uk/archive/724_Wavemeter_Class_D_No2_Working_Instructions.pdfSo here in the UK the 221 was often also called a wavemeter. Classic wavemeters were also available for example the Marconi TF975.
Robert G8RPI.

  From: Bob Camp <kb8tq@n1k.org>

To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Monday, 13 February 2017, 23:46
Subject: Re: [time-nuts] Vintage Frequency Measurement

Hi

With a VFO running, you have a heterodyne frequency meter. That is (at least to me)
a very different device than an absorption wave meter. I know way to put power into
a BC-221 and use it as an absorption device.

I’m not in any way saying that the LM or the 221 are less useful. They are still to this day
great little boxes. The just aren’t (by my understanding) wave meters. That term describes
a different device that works a different way.

Bob

On Feb 13, 2017, at 5:52 PM, John Miles john@miles.io wrote:

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.

Hi The link gives an error, but I have no doubt that the meaning of the term varies a bit. Thanks for the reference. I’ll try to get it working from here. Bob > On Feb 15, 2017, at 2:28 AM, Robert Atkinson via time-nuts <time-nuts@febo.com> wrote: > > Hi,Sorry if I caused confusion by calling the SCR/BC221 a wavemeter. Clearly it's not in the wider usage of the term, and the manual and front panel call it a frequency meter. However the similar British device was called a wavemeter "Wavemeter Class D" http://www.vmarsmanuals.co.uk/archive/724_Wavemeter_Class_D_No2_Working_Instructions.pdfSo here in the UK the 221 was often also called a wavemeter. Classic wavemeters were also available for example the Marconi TF975. > Robert G8RPI. > > From: Bob Camp <kb8tq@n1k.org> > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Sent: Monday, 13 February 2017, 23:46 > Subject: Re: [time-nuts] Vintage Frequency Measurement > > Hi > > With a VFO running, you have a heterodyne frequency meter. That is (at least to me) > a very different device than an absorption wave meter. I know way to put power into > a BC-221 and use it as an absorption device. > > I’m not in any way saying that the LM or the 221 are less useful. They are still to this day > great little boxes. The just aren’t (by my understanding) wave meters. That term describes > a different device that works a different way. > > Bob > >> On Feb 13, 2017, at 5:52 PM, John Miles <john@miles.io> wrote: >> > > > _______________________________________________ > 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.

RP

REEVES Paul

Wed, Feb 15, 2017 3:30 PM

The start of the next sentence has been incorporated in the link. Just remove the "So" at the end.... works fine.

Regards,
Paul G8GJA

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Bob Camp
Sent: 15 February 2017 12:36
To: Robert Atkinson; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Vintage Frequency Measurement

Hi

The link gives an error, but I have no doubt that the meaning of the term varies a bit.
Thanks for the reference. I’ll try to get it working from here.

Bob

On Feb 15, 2017, at 2:28 AM, Robert Atkinson via time-nuts time-nuts@febo.com wrote:

Hi,Sorry if I caused confusion by calling the SCR/BC221 a wavemeter. Clearly it's not in the wider usage of the term, and the manual and front panel call it a frequency meter. However the similar British device was called a wavemeter "Wavemeter Class D" http://www.vmarsmanuals.co.uk/archive/724_Wavemeter_Class_D_No2_Working_Instructions.pdfSo here in the UK the 221 was often also called a wavemeter. Classic wavemeters were also available for example the Marconi TF975.
Robert G8RPI.

  From: Bob Camp <kb8tq@n1k.org>

To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Monday, 13 February 2017, 23:46
Subject: Re: [time-nuts] Vintage Frequency Measurement

Hi

With a VFO running, you have a heterodyne frequency meter. That is (at
least to me) a very different device than an absorption wave meter. I
know way to put power into a BC-221 and use it as an absorption device.

I’m not in any way saying that the LM or the 221 are less useful. They
are still to this day great little boxes. The just aren’t (by my
understanding) wave meters. That term describes a different device that works a different way.

Bob

On Feb 13, 2017, at 5:52 PM, John Miles john@miles.io wrote:

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.

The start of the next sentence has been incorporated in the link. Just remove the "So" at the end.... works fine. Regards, Paul G8GJA -----Original Message----- From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Bob Camp Sent: 15 February 2017 12:36 To: Robert Atkinson; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Vintage Frequency Measurement Hi The link gives an error, but I have no doubt that the meaning of the term varies a bit. Thanks for the reference. I’ll try to get it working from here. Bob > On Feb 15, 2017, at 2:28 AM, Robert Atkinson via time-nuts <time-nuts@febo.com> wrote: > > Hi,Sorry if I caused confusion by calling the SCR/BC221 a wavemeter. Clearly it's not in the wider usage of the term, and the manual and front panel call it a frequency meter. However the similar British device was called a wavemeter "Wavemeter Class D" http://www.vmarsmanuals.co.uk/archive/724_Wavemeter_Class_D_No2_Working_Instructions.pdfSo here in the UK the 221 was often also called a wavemeter. Classic wavemeters were also available for example the Marconi TF975. > Robert G8RPI. > > From: Bob Camp <kb8tq@n1k.org> > To: Discussion of precise time and frequency measurement > <time-nuts@febo.com> > Sent: Monday, 13 February 2017, 23:46 > Subject: Re: [time-nuts] Vintage Frequency Measurement > > Hi > > With a VFO running, you have a heterodyne frequency meter. That is (at > least to me) a very different device than an absorption wave meter. I > know way to put power into a BC-221 and use it as an absorption device. > > I’m not in any way saying that the LM or the 221 are less useful. They > are still to this day great little boxes. The just aren’t (by my > understanding) wave meters. That term describes a different device that works a different way. > > Bob > >> On Feb 13, 2017, at 5:52 PM, John Miles <john@miles.io> wrote: >> > > > _______________________________________________ > 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.

SS

Scott Stobbe

Wed, Feb 15, 2017 4:03 PM

Neat bit of kit. Was it common to get IMD with harmonics out of the
vibrator power supply, and end up on tuning in on the wrong frequency?

On Wed, Feb 15, 2017 at 2:28 AM, Robert Atkinson via time-nuts <
time-nuts@febo.com> wrote:

Hi,Sorry if I caused confusion by calling the SCR/BC221 a wavemeter.
Clearly it's not in the wider usage of the term, and the manual and front
panel call it a frequency meter. However the similar British device was
called a wavemeter "Wavemeter Class D" http://www.vmarsmanuals.co.uk/
archive/724_Wavemeter_Class_D_No2_Working_Instructions.pdfSo here in the
UK the 221 was often also called a wavemeter. Classic wavemeters were also
available for example the Marconi TF975.
Robert G8RPI.

   From: Bob Camp <kb8tq@n1k.org>

To: Discussion of precise time and frequency measurement <
time-nuts@febo.com>
Sent: Monday, 13 February 2017, 23:46
Subject: Re: [time-nuts] Vintage Frequency Measurement

Hi

With a VFO running, you have a heterodyne frequency meter. That is (at
least to me)
a very different device than an absorption wave meter. I know way to put
power into
a BC-221 and use it as an absorption device.

I’m not in any way saying that the LM or the 221 are less useful. They are
still to this day
great little boxes. The just aren’t (by my understanding) wave meters.
That term describes
a different device that works a different way.

Bob

On Feb 13, 2017, at 5:52 PM, John Miles john@miles.io wrote:

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.

Neat bit of kit. Was it common to get IMD with harmonics out of the vibrator power supply, and end up on tuning in on the wrong frequency? On Wed, Feb 15, 2017 at 2:28 AM, Robert Atkinson via time-nuts < time-nuts@febo.com> wrote: > Hi,Sorry if I caused confusion by calling the SCR/BC221 a wavemeter. > Clearly it's not in the wider usage of the term, and the manual and front > panel call it a frequency meter. However the similar British device was > called a wavemeter "Wavemeter Class D" http://www.vmarsmanuals.co.uk/ > archive/724_Wavemeter_Class_D_No2_Working_Instructions.pdfSo here in the > UK the 221 was often also called a wavemeter. Classic wavemeters were also > available for example the Marconi TF975. > Robert G8RPI. > > From: Bob Camp <kb8tq@n1k.org> > To: Discussion of precise time and frequency measurement < > time-nuts@febo.com> > Sent: Monday, 13 February 2017, 23:46 > Subject: Re: [time-nuts] Vintage Frequency Measurement > > Hi > > With a VFO running, you have a heterodyne frequency meter. That is (at > least to me) > a very different device than an absorption wave meter. I know way to put > power into > a BC-221 and use it as an absorption device. > > I’m not in any way saying that the LM or the 221 are less useful. They are > still to this day > great little boxes. The just aren’t (by my understanding) wave meters. > That term describes > a different device that works a different way. > > Bob > > > On Feb 13, 2017, at 5:52 PM, John Miles <john@miles.io> wrote: > > > > > _______________________________________________ > 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. >

TS

Tim Shoppa

Wed, Feb 15, 2017 4:29 PM

For those of us who have to translate between the old "cps" and the modern
"Hz", I found this handy conversion table on the web:
http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second

Tim N3QE

[image: Inline image 1]

On Tue, Feb 14, 2017 at 5:29 AM, Peter Vince petervince1952@gmail.com
wrote:

On 14 February 2017 at 04:23, Raj vu2zap@gmail.com wrote:

I have a Marconi T.F. 643 C, in Megacycles !

Ah, a sensible, descriptive name for the unit. Some of these modern units
really do Hert(z) :-)

  Peter

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.

For those of us who have to translate between the old "cps" and the modern "Hz", I found this handy conversion table on the web: http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second Tim N3QE [image: Inline image 1] On Tue, Feb 14, 2017 at 5:29 AM, Peter Vince <petervince1952@gmail.com> wrote: > On 14 February 2017 at 04:23, Raj <vu2zap@gmail.com> wrote: > > > I have a Marconi T.F. 643 C, in Megacycles ! > > > > Ah, a sensible, descriptive name for the unit. Some of these modern units > really do Hert(z) :-) > > Peter > _______________________________________________ > 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. >

AD

Alberto di Bene

Wed, Feb 15, 2017 11:07 PM

On 2/15/2017 5:29 PM, Tim Shoppa wrote:

For those of us who have to translate between the old "cps" and the modern
"Hz", I found this handy conversion table on the web:
http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second

Tim N3QE

Nahhh.... this is much better.... :-)

http://locutus.it/public/cps2hz.gif

73 Alberto I2PHD

On 2/15/2017 5:29 PM, Tim Shoppa wrote: > For those of us who have to translate between the old "cps" and the modern > "Hz", I found this handy conversion table on the web: > http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second > > Tim N3QE Nahhh.... this is much better.... :-) http://locutus.it/public/cps2hz.gif 73 Alberto I2PHD

J

jimlux

Thu, Feb 16, 2017 2:51 PM

On 2/15/17 3:07 PM, Alberto di Bene wrote:

On 2/15/2017 5:29 PM, Tim Shoppa wrote:

For those of us who have to translate between the old "cps" and the
modern
"Hz", I found this handy conversion table on the web:
http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second

Tim N3QE

Nahhh.... this is much better.... :-)

http://locutus.it/public/cps2hz.gif

73 Alberto I2PHD

There's a better one from HP titled something like "Direct reading CPS
to Hz conversion graph" that looks like it was hand plotted on semilog
graph paper.

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.

On 2/15/17 3:07 PM, Alberto di Bene wrote: > On 2/15/2017 5:29 PM, Tim Shoppa wrote: > >> For those of us who have to translate between the old "cps" and the >> modern >> "Hz", I found this handy conversion table on the web: >> http://www.aqua-calc.com/convert/frequency/hertz-to-cycle-per-second >> >> Tim N3QE > > Nahhh.... this is much better.... :-) > > http://locutus.it/public/cps2hz.gif > > 73 Alberto I2PHD > There's a better one from HP titled something like "Direct reading CPS to Hz conversion graph" that looks like it was hand plotted on semilog graph paper. > > _______________________________________________ > 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@lists.febo.com

Vintage Frequency Measurement