Randy or Sherry Guttery wrote:
vt245 wrote:
What??? 10W - 1000W is 20db. Distance doubles every 6db - do the math...

6db is for voltage and current NOT for power .... do the research

Ok so I mixed db and dbi, point for you. Now tell me that 1000W is
"almost" indistinguishable at the recieving end from 10W - and S-units
are a valid comparison standard...

I won't tell you that they are almost indistinguishable. But I will say
that S-units should be a valid comparison standard, at least with military
gear that _is_ calibrated in 6 dB increments.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Scott Dorsey wrote:
Randy or Sherry Guttery wrote:

I won't tell you that they are almost indistinguishable. But I will say
that S-units should be a valid comparison standard, at least with military
gear that _is_ calibrated in 6 dB increments.
--scott

On virtually all of the mil receiver's I'm familiar with (or remember
much about) the signal strength (carrier) meter is marked in dBs (not S
units). I know that some of the "conversion sets" (like the RAOs) had S
meters (though the meter was dropped after S/N200 of the RAO-6; and none
of the RAO-7 had a meter). R-390s, 390As and 391s are all dBs; as were
the 1051s.

Perhaps the newer ones (post 1980) have S-meters?

That's an interesting point - what military receivers --besides
conversion sets -- have "S meters" (i.e. actually marked in S units)?

best regards...
--
randy guttery

A Tender Tale - a page dedicated to those Ships and Crews
so vital to the United States Silent Service:
http://tendertale.com

Randy or Sherry Guttery wrote:
Perhaps the newer ones (post 1980) have S-meters?

That's an interesting point - what military receivers --besides
conversion sets -- have "S meters" (i.e. actually marked in S units)?

best regards...

Why RT-718/FRC-93's, which are also know as KWM2A's do.

-Chuck

Chuck Harris wrote:

Randy or Sherry Guttery wrote:
Perhaps the newer ones (post 1980) have S-meters?


That's an interesting point - what military receivers --besides
conversion sets -- have "S meters" (i.e. actually marked in S units)?

best regards...


Why RT-718/FRC-93's, which are also know as KWM2A's do.

Don't those count as "conversions" - i.e. civilian sets "badged" with
military nomenclature?

I'll try asking again... what radios designed by / for the military (as
opposed to rebadged civilian sets) have carrier meters marked in S Units?

David - you've got a ton of mil stuff... what has meters in S units?

best regards...
--
randy guttery

A Tender Tale - a page dedicated to those Ships and Crews
so vital to the United States Silent Service:
http://tendertale.com

Randy or Sherry Guttery wrote:
Chuck Harris wrote:

Why RT-718/FRC-93's, which are also know as KWM2A's do.


Don't those count as "conversions" - i.e. civilian sets "badged" with
military nomenclature?

I'll try asking again... what radios designed by / for the military (as
opposed to rebadged civilian sets) have carrier meters marked in S Units?

David - you've got a ton of mil stuff... what has meters in S units?

best regards...

If you are going to couch the question that way, the answer is
none. Military sets have db meters. There are only a handfull
of general purpose receivers that would fit your requirement, and
most of those that you think of as purely military were also sold
to ham and civilian markets... granted, not as the primary market,
though.

The "S"-Meter is a ham invention. The "S1-9" part of the scale was an
attempt to quantize the "S" part of the R-S-T signal reporting system.
Where R is readability on a scale of 1-5, S is signal strength on a
scale of 1-9, and T is tone, on a scale of 1-9.

-Chuck

Chuck Harris wrote:

If you are going to couch the question that way, the answer is
none.

This was in response to the previous discussion of the fact there is no
standards for S unit meters (i.e. there are reports of S Units being
anywhere from 1-6db/S unit - with 6db having been a proposed (but
failed) standard - and 5db/S unit seeming to be common in modern (SSB)
rigs.

Someone mentioned that military gear using "S meters" were calibrated to
6dB/S unit. I'm not familiar (in spite of being married to a boatanchor
collector with a fair number of pieces of gear) with any "native" mil
gear with S meters - which you pretty much confirm above.

Since that individual noted mil gear with calibrated S meters - I was
exploring that question. As I noted - it wouldn't surprise me to learn
that some modern (post 1980) mil gear has S meters...

Hence the "couched" question.

best regards...
--
randy guttery

A Tender Tale - a page dedicated to those Ships and Crews
so vital to the United States Silent Service:
http://tendertale.com

Randy or Sherry Guttery wrote:
Chuck Harris wrote:

If you are going to couch the question that way, the answer is
none.

This was in response to the previous discussion of the fact there is no
standards for S unit meters (i.e. there are reports of S Units being
anywhere from 1-6db/S unit - with 6db having been a proposed (but
failed) standard - and 5db/S unit seeming to be common in modern (SSB)
rigs.

This is bad, but I agree.

Someone mentioned that military gear using "S meters" were calibrated to
6dB/S unit. I'm not familiar (in spite of being married to a boatanchor
collector with a fair number of pieces of gear) with any "native" mil
gear with S meters - which you pretty much confirm above.

That was me.

Since that individual noted mil gear with calibrated S meters - I was
exploring that question. As I noted - it wouldn't surprise me to learn
that some modern (post 1980) mil gear has S meters...

For a while (post 1980) they appeared on some of the gear that was intended
for use by relatively untrained operators, but for the most part it wasn't
widespread. Mostly because gear that was intended for skilled users (and
I put the R-390 in that category) may as well use the more accurate dB
metering, and gear that was intended for unskilled users pretty much didn't
have metering at all (like most field radios).

Hence the "couched" question.

There is a 6 dB mil standard for the things, and I'll dig it up because
I have it somewhere in my office. The fact that it doesn't get used much
if at all is quite true, though.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."