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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 ??
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 |
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