[R-390] What is the difference between 390 and 390A
Bob Camp
ham at cq.nu
Tue Apr 12 21:37:56 EDT 2005
Hi
Well the points are cumulative. If you had made it to 70 tubes then you
could have claimed the 6 point 35 tube bonus a second time.
I suppose that any radio with more than 4 *analog* meters on it should
be worth at least another 6 bonus points. Negative bonus points for
*digital* meters unless they are purely mechanical of course.
Take Care!
Bob Camp
KB8TQ
On Apr 12, 2005, at 1:51 AM, Tom Norris wrote:
> Any bonus points for a receiver with 65 tubes 5 meters (just on the
> front
> panel, there are 2 behind a lift up panel in front) AND that weighs
> around 300
> pounds? Has a cooling fan too.
>
> Why yes, it is a WRR-2, thank you.
>
> Tom NU4G
>
>> Hi
>>
>> Well here it goes:
>>
>> 190KC to 490KC BC-453? ARC-5 Command set is an 8
>> The 390A is a 9.
>> The 390 not an A is a 9.1 +/- 0.5
>> Harris RF-550 w/551 is at least 7.
>> Gotta get the R&S in there, maybe a 8.99976 +/-3.13742 (it's German -
>> we need to be precise)
>> There's the Racal RA-17, give it a -17 with all the original cooked
>> to oblivion by now resistors still in place.
>> Need to put the Heath SB-301 in there somewhere above a 5 or so.
>> I would put the R250M2 in at least in the 6's from what I have heard.
>> Be nice to see one.
>> SP-600-JX-any at least an 8
>>
>> On the other end of the scale:
>>
>> AM section of your car radio -2
>> Stations received by the FM section of your car radio -9
>> Anything satellite radio -10
>>
>> Optional points (may be additive):
>>
>> Radio's painted *very* bright colors (including stripes) -3
>> Radio's named after American Presidents -5
>> Radios designed to cover 2 to 22 MHz in one band 3/4 inch wide -12
>> Any radio made before 1920 +10
>> Radios with "massacre" in their name -3
>> Radios with LED's built into the antenna -12
>> Any radio that saved a life while turned off +5 (Motorola MX-300 in
>> bludgeon mode comes to mind)
>> Any radio that saved a life while turned on +12
>> Any radio with more than 35 tubes in it +6
>> Computer driven black box radio (including those with 35 tubes) -9
>>
>> Of course this is only the abbreviated list ....
>>
>>
>>
>>
>>
>> Enjoy!
>>
>> Bob Camp
>> KB8TQ
>>
>>
>>
>> On Apr 11, 2005, at 9:48 PM, Michael Murphy wrote:
>>
>>> That's right Bob. We like all of them. What we need is a radio
>>> performance
>>> scale. Let's call a command set receiver a 2 and an R-390 a 9. This
>>> ought
>>> to bring out the natives..
>>> Here is the scale:
>>>
>>> 1. Knight Space Spanner
>>> 2. ARC-5 Command Set
>>> 3. Heath HR-10
>>> 4. BC-348
>>> 5. Hallicrafters SX-28
>>> 6. National HRO
>>> 7. Hammarlund HQ-180
>>> 8. Drake R4B
>>> 9. R390A
>>> 10. Murphy MB-40
>>>
>>> Mike Murphy WB2UID
>>>
>>> ----- Original Message -----
>>> From: "Bob Camp" <ham at cq.nu>
>>> To: "ROBERT YOUNG" <youngbob53 at msn.com>
>>> Cc: <r-390 at mailman.qth.net>
>>> Sent: Monday, April 11, 2005 5:12 PM
>>> Subject: Re: [R-390] What is the difference between 390 and 390A
>>>
>>>> Hi
>>>>
>>>> Obviously item number 4 is a prerequisite. We *never* get rid of
>>>> radios, we just keep adding to the pile.
>>>>
>>>> Enjoy!
>>>>
>>>> Bob Camp
>>>> KB8TQ
>>>>
>>>>
>>>> On Apr 11, 2005, at 4:34 PM, ROBERT YOUNG wrote:
>>>>
>>>>> I'd like to thank all of you for taking the time to answer my
>>>>> questions of
>>>>> which I'm sure I'll have plenty more in the next months. You've
>>>>> helped
>>>>> me to
>>>>> decide which one to buy:
>>>>>
>>>>> 1. 390
>>>>> 2. 390A
>>>>> 3. SP-600
>>>>> 4. keep my HQ-180
>>>>> 5. many others.
>>>>> haha!
>>>>>
>>>>> Bob Young
>>>>>
>>>>>
>>>>>
>>>>> ----- Original Message -----
>>>>> From: "Damon Raphael" <w7md at comcast.net>
>>>>> To: "ROBERT YOUNG" <youngbob53 at msn.com>
>>>>> Cc: <r-390 at mailman.qth.net>
>>>>> Sent: Monday, April 11, 2005 3:08 PM
>>>>> Subject: Re: [R-390] What is the difference between 390 and 390A
>>>>>
>>>>>> Hello Bob,
>>>>>> I use a HQ-180, R390 and R390a.
>>>>>> The 390 radios have more accurate frequency readout, to start.
>>>>>> This is
>>>>>> not surprising since they cost a fortune in 1950s and 1960s
>>>>>> dollars
>>>>>> when
>>>>>> they were manufactured. They have the best freq readout of
>>>>>> probably
>>>>>> any
>>>>>> non digital radio ever made.
>>>>>> The 390 and 390a have the ability to listen to "wider" signals
>>>>>> which
>>>>>> means better audio fidelity when you want to listen to broadcast
>>>>>> music.
>>>>>> What the HQ-180 has, that the 390s don't, is a tunable notch
>>>>>> filter.
>>>>>> I use the Hammarlund mainly for SWL and the 390s for ham radio.
>>>>>> The
>>>>>> mechanical filters in the 390a are more effective for rejecting
>>>>>> interference than the LC filters in the 390, but may give somewhat
>>>>>> poorer quality audio fidelity at the same bandpass width.
>>>>>> The R390 may be a little more sensitive than the 390a. It has an
>>>>>> extra
>>>>>> stage of RF amplification but this probably doen't really make
>>>>>> much
>>>>>> difference as both radio are very sensitive; otherwise, the
>>>>>> Collins
>>>>>> engineers wouldn't have removed the extra stage in the redesign to
>>>>>> make
>>>>>> the 390a.
>>>>>> If you get a 390 or 390a, then you will have a considerable
>>>>>> expense in
>>>>>> getting it restored to its original operating specifications.
>>>>>> There
>>>>>> are
>>>>>> only a few people who know enough about these radios to properly
>>>>>> restore
>>>>>> them.
>>>>>> Hope thmis helps,
>>>>>> Damon Raphael, W7MD
>>>>>> Tucson, AZ
>>>>>>
>>>>>>
>>>>>> ROBERT YOUNG wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I'm new here, I'm a BCB dx'er and plan on buying a Collins
>>>>>>> within the
>>>>>>> next
>>>>>>> year and was recommended to come here for help by a fellow
>>>>>>> member of
>>>>>>> the
>>>>>>> NRC. I'll probably have a lot of questions and my first one is
>>>>>>> what
>>>>>>> is
>>>>>>> the
>>>>>>> difference between the 390 and the 390A? Which would be better
>>>>>>> for
>>>>>>> BCB
>>>>>>> DXing? Also I use a nice HQ-180 right now, can anyone compare
>>>>>>> the two
>>>>>>> for
>>>>>>> me? thanks,
>>>>>>>
>>>>>>> Bob Young
>>>>>>> _____________________________________________________________
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>>>>>>
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>>
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