content-class: urn:content-classes:message
Date: Tue, 11 Feb 2003 19:52:13 +0100
Message-ID: <2D280BB697C7EE4C979C5C89925418EF1BF5B5@TNS-FBU-2E-003.corp.telenor.no>
Thread-Topic: RE: G0MRF's class D transmitter for 136kHz (Radcom January)
Thread-Index: AcLO5RIdFOGUhST+QIKIi6nmOslAxQDGOnuw
From: jan-martin.noding@telenor.com
To: rsgb_lf_group@blacksheep.org
MIME-Version: 1.0
Subject: LF: RE: RE: G0MRF's class D transmitter for 136kHz (Radcom January)
Content-Type: text/plain; charset=iso-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Sender: <owner-rsgb_lf_group@blacksheep.org>
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

Thanks,

the reason for asking is that the article is translated and presented in Norwegian magazine "Amatör Radio" nr 2/2003, and I received some comments locally, also seems to be a mistake about a 0.07ohm resistor in a shortcircuit protection circuit, or perhaps it is only in the Norwegian translation(?), 0.7 ohm would have 7V voltage drop @10A - and would have to handle 70W power, hi  !!

73
Jan-Martin
mailto: LA8AK@online.no
http://www.laud.no/la6nca/LA8AK/ (Reflecties door LA8AK)
---
J M Nøding, Datakvalitet, TTS, Kristiansand
Telefon 0047-380-52660, 9077-7126 (QTH: 0047-380-87178)


-----Original Message-----
From: G4WGT [mailto:g4wgt@talkgas.net]
Sent: 7. februar 2003 21:00
To: rsgb_lf_group@blacksheep.org
Subject: LF: RE: G0MRF's class D transmitter for 136kHz (Radcom January)


Hi Jan-Martin,

I am also building G0MRF's 300 w Tx.
The transmitter requires 24 volts for the varicap tuning and 12 volts for
the rest of the circuit, the PA requires 36 or 45 volts (some explanations
come in part 2 February Rad Com, Hugh M0WYE has given you some details in
his reply), I have provided a 24 volt stabilised supply and from this a
second regulator for the 12 volts, the 36 volts supply is unregulated, there
are no specific details regarding power supplies in the articles, power
supply options are left to the constructor.

Let me know if you require any other info, if I can help I will.

Regards es 73

Gary    G4WGT.

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of
jan-martin.noding@telenor.com
Sent: 07 February 2003 11:34
To: rsgb_lf_group@blacksheep.org
Subject: LF: G0MRF's class D transmitter for 136kHz (Radcom January)


Supply voltage seems to be a somewhat obscure.
Can somebody confirm if it is 12V? (...hope it is 48V)


73 Jan-Martin
LA8AK@online.no

---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.449 / Virus Database: 251 - Release Date: 27/01/2003

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.449 / Virus Database: 251 - Release Date: 27/01/2003