Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

LF: AF Amps at 136

To: "RSGB LF Group" <[email protected]>
Subject: LF: AF Amps at 136
From: "Chris" <[email protected]>
Date: Sun, 18 Oct 2009 14:13:31 +0100
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=HLEuzpnaOnnpXULKbJmFVCJxA4MbO/d0RWbDhgqzcRVqQCBuGU+0wmSeGyyeNE9MjgMzCniR9mxJc4aM5WfhHXxRFhRJN/uVcYw0C0Gu08/0ecOx+KQS6Otysx6GwqbYAuU2ZYPTtDrJLcodeGL3IGGmRlOVzysjuvzw4G0niRw= ;
Domainkey-status: good (testing)
Reply-to: [email protected]
Sender: [email protected]
Hi All,
Just started constructing TX for 136kHz, noticed Maplin do a Velleman audio PA kit that is rated at 200W (100W RMS into 4R). OK there's no mains transformer or heat sink, but reckon it's good value at £14.99. Point is the specs also say the minus 3db frequency response is 3Hz / 200kHz.
The RSGB books 'LF Today' refer to using audio amps as PAs at 136 with 'a few modifications'. Does anybody know where these modifications are documented? I guess there's nothing major, reduce a few cap values? Remove Zobel Network etc.?? If anyone has experience with this approach I would appreciate some hints. Thanks.
Chris, G4AYT, Whitstable.
<Prev in Thread] Current Thread [Next in Thread>