[R-390] What is the difference between 390 and 390A
wglevy
levyfiles at att.net
Mon Apr 11 22:34:05 EDT 2005
Wrong
Satellite Radio Brilliant Radio for grown ups!
Where else can you hear " The flying purple people eater "
????
Computer and Software driven radio. Fascinating.
All the Vacuum Tube Boat Anchors Magnificent !!!!
Leave room in your hearts and minds for any radio.
IF they hear what you want to listen to they are brilliant radios!
73, Bill N2WL
----- Original Message -----
From: "Bob Camp" <ham at cq.nu>
To: "Michael Murphy" <mjmurphy45 at comcast.net>
Cc: "'R-390A List'" <r-390 at mailman.qth.net>
Sent: Monday, April 11, 2005 10:23 PM
Subject: Re: [R-390] What is the difference between 390 and 390A
> 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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>>
>
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