[ARC5] WX Report

[Ian Wilson]

B-320-A   = frequency range 2100-6300kc (antenna coil)
B-320-RF = frequency range 2100-6300kc (antenna coil)
B-320-M  = frequency range 2100-6300kc (132kc IF; .006mfd series padder)
B-320-C  = frequency range 2100-6300kc (455kc IF; .0016mfd series padder)

All these are designed to work with a standard 365pF variable capacitor.
This should be enough to get the inductance of the tuned winding, at least.

Also: "Standard antenna coil primaries are of the low impedance close
coupled
type.. RF coil primaries are of the high impedance type for maximum energy
transfer when used with pentode tubes".

>From Miller Catalog No. 48 (no date).

Hope this helps,

73, ian K3IMW




On Fri, Feb 20, 2015 at 2:45 PM, Joel R Roberts <joelroberts001 at comcast.net>
wrote:

> Now you have me drooling Mac. I am going to try and build one of the
> converters, that has been in the various articles. I just wish I could find
> the specifications on two Miller coils. They are both #B-320's one with the
> A  identifying it as the antenna coil. The other is followed by RF used as
> a mixer coil. If anyone knows anything about these Please enlighten
> me......73's     Joel KB0FPT
>
> On 2/20/2015 2:43 PM, D C _Mac_ Macdonald wrote:
>
>> Back around 1957, I used a Morrow 5BR-1 converter with the 1.5 - 3.0
>> "command" receiver as my main receiver; very sensitive and very stable.  I
>> still have several Morrow and Gonset converters now, though I am not
>> currently using any of them.  It's awfully hard to retrograde from my Icom
>> IC-7410!
>>   * * * * * * * * * * *
>> * 73 - Mac, K2GKK/5 *
>> * (Since 30 Nov 53) *
>> * k2gkk hotmail com *
>> * Oklahoma City, OK *
>> * USAF & FAA (Ret.) *
>> * * * * * * * * * * *
>>
>>
>>
>>> From: wlfuqu00 at uky.edu
>>> To: carpenterpa at tds.net; w5sum at comcast.net
>>> Date: Fri, 20 Feb 2015 21:35:49 +0000
>>> CC: arc5 at mailman.qth.net
>>> Subject: Re: [ARC5] WX Report
>>>
>>>    I used one with various receivers, not with an ARC-5 and found it to
>>> be surprising sensitive and stable for it's simplicity.
>>> I think part of that was due to its use of harmonics of the local
>>> oscillator rather than bandswitching coils as most receivers
>>> and converters of its day. The RF amplifier also helped.
>>>   73
>>> Bill wa4lav
>>>   ________________________________________
>>> From: ARC5 [arc5-bounces at mailman.qth.net] on behalf of Phillip
>>> Carpenter [carpenterpa at tds.net]
>>> Sent: Friday, February 20, 2015 4:10 PM
>>> To: Ronnie Hull
>>> Cc: arc5 at mailman.qth.net
>>> Subject: Re: [ARC5] WX Report
>>>
>>> OK, I'll kick us back off to ARC-5s.
>>>
>>> Has anyone tried using a Gonset converter as a front end to the BC-946
>>> receiver?
>>>
>>> I have both and am tempted to try it.
>>>
>>> I have a Gonset Super 6 converter.
>>>
>>> I'd love to hear from someone who as actually done it. How well does the
>>> combo work?
>>>
>>> Respectfully,
>>>
>>> Phillip
>>>
>>
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