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Hammarlund PRO-310 ??
I just got one and the medallion on the front is missing. Anyone have a
spare or know where I can get one or how to make one. The dial cords need to be restrung and there's no diagram in the manual so I'd like to know if anyone has the info in their archives. The cord is quite hard and heavier than anything I've seen before, about 0.080 inch , or 2 mm in diameter pretty close to No. 12 wire. Where would I get some? tnx -- 73 Hank WD5JFR |
Hammarlund PRO-310 ??
On Feb 16, 7:42 am, "Henry Kolesnik"
wrote: I just got one and the medallion on the front is missing. Anyone have a spare or know where I can get one or how to make one. The dial cords need to be restrung and there's no diagram in the manual so I'd like to know if anyone has the info in their archives. The cord is quite hard and heavier than anything I've seen before, about 0.080 inch , or 2 mm in diameter pretty close to No. 12 wire. Where would I get some? tnx -- 73 Hank WD5JFR Was this the $900 one on Ebay? Other than the dial cord problem, does it seem to work ok? Paul, KD7HB |
Hammarlund PRO-310 ??
Nope I picked up at a hamfest....
I haven't Variaced it yet till it gets aclimatized.. " wrote in message oups.com... On Feb 16, 7:42 am, "Henry Kolesnik" wrote: I just got one and the medallion on the front is missing. Anyone have a spare or know where I can get one or how to make one. The dial cords need to be restrung and there's no diagram in the manual so I'd like to know if anyone has the info in their archives. The cord is quite hard and heavier than anything I've seen before, about 0.080 inch , or 2 mm in diameter pretty close to No. 12 wire. Where would I get some? tnx -- 73 Hank WD5JFR Was this the $900 one on Ebay? Other than the dial cord problem, does it seem to work ok? Paul, KD7HB |
Hammarlund PRO-310 ??
The PRO-310 is a gorgeous receiver. Unfortunately, it has a case built
inside a case and is very difficult to work on. On the broadcast band, it is single conversion, which presents a problem for images. There were two different color models and they were too expensive to manufacture. They are certainly collector's items. Colin K7FM |
Hammarlund PRO-310 ??
"COLIN LAMB" wrote in message nk.net... The PRO-310 is a gorgeous receiver. Unfortunately, it has a case built inside a case and is very difficult to work on. On the broadcast band, it is single conversion, which presents a problem for images. There were two different color models and they were too expensive to manufacture. They are certainly collector's items. Colin K7FM Well, lots of receivers are single conversion on the broadcast band and do not have image problems. It seems to me that the PRO-310 did have some problems, something to do with the gain structure I think. It got fixed but they were simply too expensive to compete at the time. For about the same price one could buy a 75A4, which is arguably a better ham receiver and could buy RX such as the GPR-90 for less money. It would be interesting to know the story behind the PRO-310, it was beautiful, worked well, but just missed the mark. -- --- Richard Knoppow Los Angeles, CA, USA -- Posted via a free Usenet account from http://www.teranews.com |
Hammarlund PRO-310 ??
It missed the mark in its day but today they're scarce and quite
collectible. I recall reading the review back in 56 when I was in high school and have been after one ever since. this is the second one I've ever seen. Kinda like if there was only one dandelion everyone would like to have in their lawn. -- 73 Hank WD5JFR "Richard Knoppow" wrote in message .. . "COLIN LAMB" wrote in message nk.net... The PRO-310 is a gorgeous receiver. Unfortunately, it has a case built inside a case and is very difficult to work on. On the broadcast band, it is single conversion, which presents a problem for images. There were two different color models and they were too expensive to manufacture. They are certainly collector's items. Colin K7FM Well, lots of receivers are single conversion on the broadcast band and do not have image problems. It seems to me that the PRO-310 did have some problems, something to do with the gain structure I think. It got fixed but they were simply too expensive to compete at the time. For about the same price one could buy a 75A4, which is arguably a better ham receiver and could buy RX such as the GPR-90 for less money. It would be interesting to know the story behind the PRO-310, it was beautiful, worked well, but just missed the mark. -- --- Richard Knoppow Los Angeles, CA, USA -- Posted via a free Usenet account from http://www.teranews.com |
Hammarlund PRO-310 ??
"Well, lots of receivers are single conversion on the
broadcast band and do not have image problems." Well, that is true, but what I left out was that the if is 50 kHz. It is the only radio to my knowledge that runs 50 kHz ifs with single conversion. The bandspread tuning is quite unique. There was supposed to be a run of 1,000 - but I bet less than 100 are still around. Maybe the other 900 are still in a warehouse and will show up on the surplus market one of these days - ha. I have one. Colin K7FM |
Hammarlund PRO-310 ??
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. |
Hammarlund PRO-310 ??
"COLIN LAMB" wrote in message ink.net... "Well, lots of receivers are single conversion on the broadcast band and do not have image problems." Well, that is true, but what I left out was that the if is 50 kHz. It is the only radio to my knowledge that runs 50 kHz ifs with single conversion. The bandspread tuning is quite unique. There was supposed to be a run of 1,000 - but I bet less than 100 are still around. Maybe the other 900 are still in a warehouse and will show up on the surplus market one of these days - ha. I have one. Colin K7FM 50Khz, I will have to look at the schematics. I knew there was a low frequency IF involved in order to get sharp selectivity using conventional components. 50khz _would_ be likely to have problems with images. -- --- Richard Knoppow Los Angeles, CA, USA -- Posted via a free Usenet account from http://www.teranews.com |
Hammarlund PRO-310 ??
It is dual conversion at some point, but not the lowest band.
Colin K7FM |
Hammarlund PRO-310 ??
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 |
Hammarlund PRO-310 ??
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. |
Hammarlund PRO-310 ??
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 |
Hammarlund PRO-310 ??
"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 |
Hammarlund PRO-310 ??
"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 |
Hammarlund PRO-310 ??
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 |
Hammarlund PRO-310 ??
"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 |
Hammarlund PRO-310 ??
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 |
Hammarlund PRO-310 ??
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 |
Hammarlund PRO-310 ??
Dave
Thanks for the history. The turret looks very much like a bigger copy of the TV tuner turrets from the late 40s and early 50s. It's a good idea but too expensive. I guess the emblem was glued with some pretty sorry adhesive as I can't see any residue from where it should have been. If it was poor adhesive and they were falling off there should be a spare or two around. Wish I could find one. -- 73 Hank WD5JFR "David Thompson" wrote in message nk.net... 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 |
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