[Boatanchors] W2EWL VFO range?

Tue Mar 22 13:15:03 EDT 2011

And I have the VFO. All I really dont need is the 300# transmitter

Carl
KM1H

----- Original Message ----- 
From: "Lloyd Godsey" <kk7iz at cox.net>
To: "Carl" <km1h at jeremy.mv.com>; "Jim" <jbrannig at verizon.net>; 
<boatanchors at mailman.qth.net>
Sent: Tuesday, March 22, 2011 1:06 PM
Subject: Re: [Boatanchors] W2EWL VFO range?

>I have the manual for a Meissner 150B.  Pub US Signal Corp 1942.
> To my surprise the output tank circuit for the 813 final is a true Pi-net.
>
>
>
> Thanx
> Lloyd Godsey KK7IZ
> kk7iz at cox.net
> 480-620-7145
> http://www.antiqueaircraftradios.com/
> http://www.antiqueradioarchives.com/
>
> -----Original Message----- 
> From: Carl
> Sent: Tuesday, March 22, 2011 9:44 AM
> To: Jim ; boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] W2EWL VFO range?
>
> Jeez, it took you a long time to get out of the 30's! I discovered the
> bandswitch, pi-network and parallel tubes in an amp around 1959. A lot 
> safer
> than the PP 250TH's I had been using on CW/AM.
>
> The 2 x 250TH's I use on AM these days are in parallel, etc.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- 
> From: "Jim" <jbrannig at verizon.net>
> To: "D C *Mac* Macdonald" <k2gkk at hotmail.com>; <james.liles at comcast.net>;
> <boatanchors at mailman.qth.net>
> Sent: Tuesday, March 22, 2011 12:23 PM
> Subject: Re: [Boatanchors] W2EWL VFO range?
>
>
>>
>> This thread got me traveling down memory lane.
>> I had a CE-20A+BC-457VFO in the early 70's.
>> Curiosity got me and I went to the BAMA site to refresh the ole gray 
>> cells
>> on the frequency multiplier scheme in the VFO.
>>
>> The station band change procedure was as follows:
>> Set the 75A3 to correct band/Frequency.
>> Select the bans switch on the VFO
>> Crank the VFO tuning dial to the approximate frequency
>> Set the band switches on the 20A
>> Turn off the HV to the amp.  (PP 811A's)
>> Change the grid coil.
>> Change the Plate coil.
>> Switch in the dummy load.
>> Tune the CE 20A
>> Tune the amplifier.
>> Select an antenna
>> Tune the open wire tuner.
>>
>> WHEW!!!!!!
>>
>> Hope the DX station is still there.....
>>
>> Jim
>>
>>
>>
>>
>>
>>
>>>
>>> SSB signal generated at 9 MC/s and BC-457's VFO covered 4.0 - 5.3.
>>>
>>> Single conversion could theortically cover 3.7-5.0 with a subtraction
>>> mixing scheme and 13.0 - 14.3 by using an addition mixing simply
>>> by tuning the final (IIRC).
>>>
>>> Practically, 5.0 - 5.3 gave 80m coverage of 4.0 - 3.7. Note the
>>> reversal of tuning direction.
>>>
>>> On 20m, 5.0 - 5.3 gave coverage of 14.0 - 14.3.
>>>
>>> I suspect that the problem of 3rd harmonics is a result of the
>>> builder using too much L in the output tank and not enough C
>>> resulting in Q that is too low.
>>>
>>>
>>> * * * * * * * * * * *
>>> * 73 - Mac, K2GKK/5 *
>>> * (Since 30 Nov 53) *
>>> * Oklahoma City, OK *
>>> * USAF, Ret (61-81) *
>>> * * * * * * * * * * *
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>> From: james.liles at comcast.net
>>>> To: boatanchors at mailman.qth.net
>>>> Date: Tue, 22 Mar 2011 08:09:04 -0700
>>>> Subject: [Boatanchors] W2EWL VFO range?
>>>>
>>>> Hi Bob:
>>>>
>>>> What was the heterodyne scheme used with the W2EWL --- what was the VFO
>>>> range? Kindest regards Jim K9AXN
>>>>
>>>> Message: 8
>>>> Date: Mon, 21 Mar 2011 22:20:32 -0500
>>>> From: Robert Nickels <ranickel at comcast.net>
>>>> Subject: Re: [Boatanchors] OT: Ignorance :))
>>>> To: boatanchors at mailman.qth.net
>>>> Message-ID: <4D881580.4040203 at comcast.net>
>>>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>>>
>>>> On 3/21/2011 9:24 PM, D C *Mac* Macdonald wrote:
>>>> > Carl, I also started with the W2EWL "Cheap
>>>> > and Easy S.S.B." rig that I built in 1962
>>>> >
>>>> You can take a look at mine and even hear some audio from it (albeit a
>>>> little off-frequency) here:
>>>>
>>>> http://www.vintagessb.net/w9ran.htm#cheap
>>>>
>>>> Scroll down to the bottom of the page. I had a lot of fun finishing it
>>>> up and getting it going, but have not been able to overcome 3rd 
>>>> harmonic
>>>> VFO problems on 20 meters, thus it's working on 75 only at this time.
>>>> While there are compromises, I give Anthony Vitale a lot of credit for
>>>> turning the Dome/Norgaard design into a practical transmitter that 
>>>> could
>>>> be built by lot of average hams (and was!)
>>>>
>>>> 73, Bob W9RAN
>>>>
>>>> ______________________________________________________________
>>>> Boatanchors mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Boatanchors at mailman.qth.net
>>>>
>>>> List Administrator: Duane Fischer, W8DBF
>>>> ** For Assistance: dfischer at usol.com **
>>>>
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>> ______________________________________________________________
>>> Boatanchors mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Boatanchors at mailman.qth.net
>>>
>>> List Administrator: Duane Fischer, W8DBF
>>> ** For Assistance: dfischer at usol.com **
>>>
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.894 / Virus Database: 271.1.1/3522 - Release Date: 03/22/11 
> 00:34:00 