It is dual conversion at some point, but not the lowest band.

Colin K7FM

It's single conversion on the two lower bands below 2.2 Mc, IF is 52Kc
on those single conversion and 1802 Kc with double conversion on the 4
upper covering up to 35.53 Mc. Hey an expensive Q5er!

--

73
Hank WD5JFR

"COLIN LAMB" wrote in message
ink.net...
It is dual conversion at some point, but not the lowest band.

Colin K7FM

I just took some shots of the beast with I'm guessing 35 years of dust
because I found a page from ham radio magazine, a Robot ad with ham
frequency allocations for Nov 1972. The ad has about the same amount of
dust on it as the radio. The 65 lb beast looks complete and original
except no medallion on the front I need to find one or get one made.
Several pics going up on the binaries.

--

73
Hank WD5JFR
"Paul P" wrote in message
news:AvQBh.737$h8.472@trnddc05...
Gets,

How about a picture of you personal units on the binaries?

And Henry Please keep us posted either RAR+P or on the boatanchors
thread/group of your choice.

Paul.

W8ZR has a Pro -310 on his website. No medalion.

He mentions that the cabinet was wrinkle with black with gold trim or grey
with silver trim. Somewhere, I think I read that at least came out of the
factory in baby blue but maybe that was actually grey that had changed color
slightly or viewed under special lighting.

Note on the radio shown at W8ZR, that there is no medalion. It is possible
that one of the runs did not have it.

Mine does have a medalion, although it is some distance away right now. It
is the black and gold version. I do have the manual with a photo of the
medalion that could be used to recreate one. Someone with a bit of time and
artistic ability should have no problem getting something that is close
enough.

Let me know if you would like me to scan it. The copy will not be
particularly good, but should get you in the ball park.

73, Colin K7FM

"Henry Kolesnik" wrote in
message
et...
It's single conversion on the two lower bands below 2.2
Mc, IF is 52Kc on those single conversion and 1802 Kc
with double conversion on the 4 upper covering up to 35.53
Mc. Hey an expensive Q5er!

--

73
Hank WD5JFR

"COLIN LAMB" wrote in message
ink.net...
It is dual conversion at some point, but not the lowest
band.

Colin K7FM


It seems to me that Hallicrafters did the same thing with
a couple of their receivers. BTW, I _thought_ there was a
PRO-310 handbook on the web and that I had it. Evidently its
not so. I found some advertising and nothing more.


--
---
Richard Knoppow
Los Angeles, CA, USA




--
Posted via a free Usenet account from http://www.teranews.com

"Henry Kolesnik" wrote in
message
et...
I just took some shots of the beast with I'm guessing 35
years of dust because I found a page from ham radio
magazine, a Robot ad with ham frequency allocations for Nov
1972. The ad has about the same amount of dust on it as
the radio. The 65 lb beast looks complete and original
except no medallion on the front I need to find one or get
one made. Several pics going up on the binaries.

--

73
Hank WD5JFR

One site I looked at while trying to find out more
about this beast stated the medallion was attached
originally with double-stick tape! No wonder its missing.


--
---
Richard Knoppow
Los Angeles, CA, USA




--
Posted via a free Usenet account from http://www.teranews.com

Richard Knoppow wrote:

"Henry Kolesnik" wrote in
message
et...
I just took some shots of the beast with I'm guessing 35
years of dust because I found a page from ham radio
magazine, a Robot ad with ham frequency allocations for Nov
1972. The ad has about the same amount of dust on it as
the radio. The 65 lb beast looks complete and original
except no medallion on the front I need to find one or get
one made. Several pics going up on the binaries.

--

73
Hank WD5JFR

One site I looked at while trying to find out more
about this beast stated the medallion was attached
originally with double-stick tape! No wonder its missing.

I think Hammarlund did that with a bunch of its models.

dxAce
Michigan
USA

"dxAce" wrote in message
...


Richard Knoppow wrote:

"Henry Kolesnik" wrote in
message
et...
I just took some shots of the beast with I'm guessing 35
years of dust because I found a page from ham radio
magazine, a Robot ad with ham frequency allocations for
Nov
1972. The ad has about the same amount of dust on it as
the radio. The 65 lb beast looks complete and original
except no medallion on the front I need to find one or
get
one made. Several pics going up on the binaries.

--

73
Hank WD5JFR

One site I looked at while trying to find out more
about this beast stated the medallion was attached
originally with double-stick tape! No wonder its missing.

I think Hammarlund did that with a bunch of its models.

dxAce
Michigan
USA


I think the original poster said this RX had been in
storage for many years. Perhaps it would be worth searching
the area where it was stored for the missing medallion.


--
---
Richard Knoppow
Los Angeles, CA, USA




--
Posted via a free Usenet account from http://www.teranews.com

I have an interview on tape with Frank Lester W4AMJ (then W2AMJ) who was Mr.
Hammarlund from 1955 to 1970. When he was hired by Lloyd Hammarlund (son
of the founder) he found the Pro-310 did not come close to specs. He and
the Engineers spend quite a bit on bring it "close" to apecs.

The reason you don't see many is that the turret costs $85 per unit. That
is what there is the box within a box. Hopefully the band switch cable has
only fallen off. Otherwise its a nice box outside and a real dud inside.
Lloyd put a stop to production after only a few hundred units!

Frank found that none of the Engineers were hams. Since Lloyd cut off the
funds Frank went to work to get some of the Engineers to be hams. He went
to work on what saved Hammarlund (outside of several commercial ventures)
and that was the HC-10/SPC-10 SSB/CW converter. Frank wanted to use crystal
or mechanical filters but Lloyd asked for alternatives (they were
cheap)which is the principle reason for the 60 kcs IF's found in the HQ-170,
HQ-180, and the HC-10. Lloyd kept the old SP-600 series alive by selling
the SPC-10 at several times the HC-10 price to the thousands of users.

But never fear, the idea behind the Pro-310 stayed alive in the guise of the
HQ-215.

Hope the Pro-310 turns out to be a great piece of History. Frank could
never say why the H emblem was missing from most of the units.

73 Dave K4JRB

One site I looked at while trying to find out more
about this beast stated the medallion was attached
originally with double-stick tape! No wonder its missing.


Yes. My medalion has not been reinstalled because I have not repainted it -
but it was double sided tape - and not very good. I almost threw mine out
by mistake because I did not find it in the packing.

73, Colin