[Boatanchors] Spark Gap

[Geoff]

Thanks Howie. I have QST from 1926 to date but was going from memory as I 
havent read the early ones in many years. My own interset starts around 
1928-29 and AC operated equipment.
Currently rebuilding a 1928 Radiola 60 superhet as the IF strip for a 
20-160M converter using period components. That will go with a similar 
transmitter.




----- Original Message ----- 
From: "Howard Holden" <holden7471 at msn.com>
To: "Geoff" <geoffrey at jeremy.mv.com>; "Mark K3MSB" <mark.k3msb at gmail.com>; 
"List Boatanchors" <boatanchors at mailman.qth.net>
Sent: Sunday, July 08, 2012 11:11 PM
Subject: Re: [Boatanchors] Spark Gap


> According to a 1992 historical article in QST, in 1924, when the 80 40 20
> and 5 meter bands were allocated to Amateurs, spark was prohibited on 
> them.
> The Radio Act of 1927 further banned spark from all Amateur use.
>
> Can't locate actual wording about the ban of spark on Amateur frequencies,
> but for commercial interests, no new spark installations were allowed 
> after
> 1930, and spark was generally prohibited after 1940. Certain exceptions 
> were
> allowed on a non-interference basis. This according to Sterling's Radio
> Manual, 1928.
>
> Guess you'd have to really peruse the 1924-1927 QSTs to see actual dates 
> of
> effectivity for Amateurs.
>
> Howie WB2AWQ
>
> -----Original Message----- 
> From: Geoff
> Sent: Sunday, July 08, 2012 5:35 PM
> To: Mark K3MSB ; List Boatanchors
> Subject: Re: [Boatanchors] Spark Gap
>
> The Radio Act of 1927 maybe for ham gear. Ive also heard 1924.
>
> Some spark was still on merchant ships until around 1940.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- 
> From: "Mark K3MSB" <mark.k3msb at gmail.com>
> To: "List Boatanchors" <boatanchors at mailman.qth.net>
> Sent: Sunday, July 08, 2012 5:47 PM
> Subject: [Boatanchors] Spark Gap
>
>
>> When was spark transmission made illegal?   Lot of info on the web about
>> spark gap,  but I can't find anything about the date it was made illegal.
>>
>> Thanks
>>
>> Mark K3MSB
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