Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE,HTML_TINY_FONT,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u1TCSD6m005684 for ; Mon, 29 Feb 2016 13:28:14 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aaMrG-0006m8-TY for rs_out_1@blacksheep.org; Mon, 29 Feb 2016 12:23:26 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aaMrG-0006lz-Cr for rsgb_lf_group@blacksheep.org; Mon, 29 Feb 2016 12:23:26 +0000 Received: from mail-vk0-x22d.google.com ([2607:f8b0:400c:c05::22d]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.86) (envelope-from ) id 1aaMpM-0002o8-2f for rsgb_lf_group@blacksheep.org; Mon, 29 Feb 2016 12:23:25 +0000 Received: by mail-vk0-x22d.google.com with SMTP id e185so131522949vkb.1 for ; Mon, 29 Feb 2016 04:21:02 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to; bh=NAwttAYKLymZzHBsiNkswppGgype3B6eROMnERfCPY0=; b=FlI7+sKG8Q4vPbtSqZy0OcP8P9FX5evlr2f2XJgvZ6W8gs6+LqRihWasFcVH2O4TiG 66nEqntuEKG4Gjb/olroY2f3OCpt0OlXZktI1s40etxyS7n4PXPUV3t2mQAw6BCAkVKM Ptf2yfE0y7zH77rMTbsLzqjaU9o5f2sE1DMg2DgTQfu5YzFf25MnltzfabENRxN4n+3L qAlddDVsI5KsmA2xjCB38wYKPn6y4BQ+ZNsM+LqjhY0erhO8IKFG3wXLOGr3PbJ0nPiV n1wgUeOgrfCOyW3ro9C1HAjl7/+5xl03WbaMB/eAKvq9H70vFDKdM1yNdkvc5WA0/tas Dslg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to; bh=NAwttAYKLymZzHBsiNkswppGgype3B6eROMnERfCPY0=; b=NqXfPNj+3QAM0BXmiXv6UdumHdYNpnWYFZ2S/tZ3UNsBZWcEPdx2BbBJh/zi1bk2wj +oW7uzoFCJ4dtTcBNoEHbIC2bSV+RXTUX5rBIM4Y6mvieTRB3mh9CIvmak9Du/ASwDMY 0q3nTGQn+SssCoKzklby/1AUFmlT59yovyQfC0QloN0pt7XYM9C8Y0ZZKenrg7nOZCTK 7j+bXmw6SI5CbJhkG0jrHzrEEbkCBAaCfnp5QiyxpDAFY1TnjhuNcXqJ2tPw1YIqYwa9 JGj/jhJJRCfBkrjzkA1LHX9f0UBu6c17wpgln+1ZjPr2uoEPvBiYM2Xf2IfuFeSKLwy+ MtUw== X-Gm-Message-State: AD7BkJIWaToFWFDqpuX0lTG5xkmLR1Mqft8Mpc99k+P+hcM6HapNIwWCZHYcvYRr3LvKEvhOcAcXBlhH180v5g== MIME-Version: 1.0 X-Received: by 10.31.171.143 with SMTP id u137mr11621154vke.88.1456748460454; Mon, 29 Feb 2016 04:21:00 -0800 (PST) Received: by 10.159.32.198 with HTTP; Mon, 29 Feb 2016 04:21:00 -0800 (PST) In-Reply-To: References: <56D34DDF.9060303@charter.net> Date: Mon, 29 Feb 2016 12:21:00 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@yahoogroups.co.uk, rsgb_lf_group@blacksheep.org X-Scan-Signature: 345aee7da6dbe48c6596042d8865d1b2 Subject: Re: [rsgb_lf_group] Re: LF: Wolf Test transmission running Content-Type: multipart/alternative; boundary=001a1143e99c833c9b052ce7ae39 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7116 --001a1143e99c833c9b052ce7ae39 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Ah... SRI, if I blocked your last bit of listening for TAG/DES.... Think I must be getting old and doolally :-( Testing a linear PA I completely forgot I had, and, more to the point and worryingly, don't even recall much about building. It has been sitting in my loft for many years, with a price label on having been unable to sell at a few rallies. It looks like a G0MRF design, but using 2SK413 devices which are designed for audio amplifiers - not specifically switching types. Four devices, in 2+2 push pull running off 50V it seems to be delivering 250 Watts happily at the moment. I've also added feedback around each pair consisting of 820 ohms 2 Watt in series with 220nF The PA is built into the same casing as my old 73kHz unit that originally used two Maplin amplifiers in bridge and delivered 180W; that wouldn't work very well on 137kHz and I do - now- recall taking the modules out and building this MRF design. But, for some reason never used it in anger. Maybe because that was the time I was developing the 700 Watts switchmode one which was much more exciting It was all so long ago... Anyway, the whole thing is fully metered, with DC current RF voltage and current and heatsink temperature all available on a front panel meter. Switchable taps on the output transformer for 50 - 200 ohms antenna R. Gain rolls off but it does seem to give about 180 Watts at 475kHz, probably due to the driver I used, which is... wait for it.... A . [something]2000 (that's what its labelled, anyway) audio power amplifier in TO220 can. Probably a TC2000 looking at my datasheet archive, there is a file for that device, dated 1998 So hardly surprising gain is down at MF I'm soak testing it at the moment. Those FETs aren't really suitable for 50V working with uncertain loads. They are rated at 160 V max, so with a 50V rail see 100V anyway so a bit close for comfort. But I'm going to soak test it anyway! So, to recap - the signal your are getting from me now is 7.5dB up on yesterday's There is the added advantage, I can use the 50V SMPSU which suffers no heat problems at all, and laughs at the 9 - 10 Amps this PA is drawing Andy G4JNT On 29 February 2016 at 11:58, Steve Elliston sgelliston@gmail.com [rsgb_lf_group] wrote: > > > ..a better signal during the day Andy... > > On Mon, Feb 29, 2016 at 11:13 AM, Steve Elliston > wrote: > >> ...not found anywhere...but the sun is rising on FN42ch so we may find >> out soon.. >> 73 >> Steve >> >> On Mon, Feb 29, 2016 at 10:53 AM, Andy Talbot andy.g4jnt@gmail.com >> [rsgb_lf_group] wrote: >> >>> >>> >>> What's the EIRP at 'TAG / 'XES? >>> >>> Andy G4JNT >>> >>> On 29 February 2016 at 10:35, Steve Elliston sgelliston@gmail.com >>> [rsgb_lf_group] wrote: >>> >>>> >>>> >>>> >>>> >>>> ...and W1TAG / WD2XES (FN42ch) to G3XKR (IO70ux) =3D 5067.7km =3D 31= 45.82 >>>> miles >>>> >>>> 73 >>>> Steve >>>> G3XKR >>>> >>>>> t:2208 f:-0.410 pm:104.5 jm:661 q: 0.5 -2.2 WD2XES WOLFING - >>>>> t:2304 f:-0.410 pm:112.8 jm:661 q: 0.8 -1.8 WD2XES WOLFING - >>>>> t:2400 f:-0.410 pm:113.5 jm:661 q: 0.9 -1.6 WD2XES WOLFING - >>>>> t:2496 f:-0.410 pm:116.0 jm:661 q: 1.0 -1.6 WD2XES WOLFING - >>>>> t:2592 f:-0.410 pm:118.0 jm:662 q: 0.9 -1.1 WD2XES WOLFING - >>>>> t:2688 f:-0.410 pm:121.1 jm:662 q: 1.2 -0.9 WD2XES WOLFING - >>>>> t:2784 f:-0.410 pm:123.5 jm:662 q: 1.4 -0.7 WD2XES WOLFING - >>>>> t:2880 f:-0.410 pm:124.4 jm:662 q: 1.5 -0.8 WD2XES WOLFING - >>>>> t:2976 f:-0.410 pm:129.0 jm:662 q: 1.8 -0.6 WD2XES WOLFING - >>>>> t:3072 f:-0.410 pm:129.3 jm:662 q: 1.9 -0.5 WD2XES WOLFING - >>>>> t:3168 f:-0.410 pm:131.7 jm:662 q: 2.1 -0.3 WD2XES WOLFING - >>>>> 2016-02-29 01:36:12 >WOLF10 -r 8000 -f 700 -t 1.0 -w 0.0000 >>>>> >>>>> > >>>>> > >>>>> >>>>> >>>> >>> >> > __._,_.___ > ------------------------------ > Posted by: Steve Elliston > ------------------------------ > Reply via web post > > =E2=80=A2 Reply to sender > > =E2=80=A2 Reply to group > > =E2=80=A2 Start a new topic > > =E2=80=A2 Messages in this topic > > (7) > Visit Your Group > > > - New Members > > 1 > > [image: Yahoo! Groups] > > =E2=80=A2 Privacy =E2=80=A2 > Unsubscribe > =E2= =80=A2 Terms > of Use > > . > > __,_._,___ > --001a1143e99c833c9b052ce7ae39 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Ah...
SRI, if I blocked your last bit of li= stening for TAG/DES....

Think I must be getting ol= d and doolally =C2=A0:-(

Testing a linear PA I com= pletely =C2=A0forgot I had, and, more to the point and worryingly, don'= t even recall much about building.=C2=A0 It has been sitting in my loft for= many years, with a price label on having been unable to sell at a few rall= ies.=C2=A0=C2=A0

It looks like a G0MRF design, bu= t using 2SK413 devices which are designed for audio amplifiers=C2=A0 - not = specifically switching types.=C2=A0=C2=A0 Four devices, in 2+2 push pull=C2= =A0running off 50V it seems to be delivering 250 Watts happily at the momen= t.=C2=A0=C2=A0=C2=A0 I've also added feedback around each pair consisti= ng of 820 ohms 2 Watt in series with 220nF

The PA = is built into the same casing as my old 73kHz unit that originally used two= Maplin amplifiers in bridge and delivered 180W;=C2=A0 that wouldn't wo= rk very well on 137kHz and I do - now- recall taking the modules out and bu= ilding this MRF design.=C2=A0 But, for some reason never used it in anger.= =C2=A0 Maybe because that was the time I was developing the 700 Watts switc= hmode one which was much more exciting=C2=A0 It was all so long ago...

Anyway,=C2=A0the whole thing=C2=A0is fully metered, wi= th DC current RF voltage and current and heatsink temperature all available= on a front panel=C2=A0 meter.=C2=A0 Switchable taps on the output transfor= mer for 50 - 200 ohms antenna R.

Gain rolls off bu= t it does seem to give about 180 Watts at 475kHz, probably due to the drive= r I used, which is...=C2=A0=C2=A0 wait for it....

= A . [something]2000 (that's what its labelled, anyway) audio power ampl= ifier in TO220 can.=C2=A0=C2=A0 Probably a TC2000 looking at my datasheet a= rchive, there is a file for that device, =C2=A0dated 1998=C2=A0=C2=A0 So ha= rdly surprising gain is down at MF

I'm soak te= sting it at the moment.=C2=A0 Those FETs aren't really suitable for 50V= working with uncertain loads.=C2=A0 They are rated at 160 V max, so with a= 50V rail see 100V anyway so a bit close for comfort.=C2=A0 But I'm goi= ng to soak test it anyway!

So, to recap - the sign= al your are getting from me now is 7.5dB up on yesterday's
There is the added advantage, I can use the 50V SMPSU which su= ffers no heat problems at all, and laughs at the 9 - 10 Amps this PA=C2=A0i= s drawing

Andy=C2=A0 G4JNT


On 29 February= 2016 at 11:58, Steve Elliston sgel= liston@gmail.com [rsgb_lf_group] <rsgb_lf_group@yahoogro= ups.co.uk> wrote:
=20
=C2=A0
=20 =20

..a better signal during the day Andy...

On Mon, Feb 29, 2016= at 11:13 AM, Steve Elliston <sgelliston@gmail.com> wrote= :
...= not found anywhere...but the sun is rising on FN42ch so we may find out soo= n..
73
Steve

= On Mon, Feb 29, 2016 at 10:53 AM, Andy Talbot andy.g4jnt@gmail.com [rsgb_lf_group] <rsgb_lf_group@yahoogroups.co.uk> wrote:
=20
=C2=A0
=20 =20

What's the EIRP at=C2=A0 =C2=A0'= TAG / 'XES?

Andy=C2=A0 G4JNT

On 29 February 2016= at 10:35, Steve Elliston sgelliston@gmail.com [rsgb_lf_group] <rsgb_lf_g= roup@yahoogroups.co.uk> wrote:
=20
=C2=A0
=20 =20



..= .and W1TAG / WD2XES (FN42ch) =C2=A0to =C2=A0G3XKR (IO70ux) =3D 5067.7km =3D= 3145.82 miles

73
Steve
G3XKR
<= /div>
t:2208 f:-0.41= 0 pm:104.5 jm:661 q: =C2=A00.5 -2.2 WD2XES WOLFING =C2=A0-
= t:2304 f:-0.410 pm:112.8 jm:661 q: =C2=A00.8 -1.8 WD2XES WOLFING =C2=A0-
t:2400 f:-0.410 pm:113.5 jm:661 q: =C2=A00.9 -1.6 WD2XES WOLFING = =C2=A0-
t:2496 f:-0.410 pm:116.0 jm:661 q: =C2=A01.0 -1.6 WD2XES = WOLFING =C2=A0-
t:2592 f:-0.410 pm:118.0 jm:662 q: =C2=A00.9 -1.1= WD2XES WOLFING =C2=A0-
t:2688 f:-0.410 pm:121.1 jm:662 q: =C2=A0= 1.2 -0.9 WD2XES WOLFING =C2=A0-
t:2784 f:-0.410 pm:123.5 jm:662 q= : =C2=A01.4 -0.7 WD2XES WOLFING =C2=A0-
t:2880 f:-0.410 pm:124.4 = jm:662 q: =C2=A01.5 -0.8 WD2XES WOLFING =C2=A0-
t:2976 f:-0.410 p= m:129.0 jm:662 q: =C2=A01.8 -0.6 WD2XES WOLFING =C2=A0-
t:3072 f:= -0.410 pm:129.3 jm:662 q: =C2=A01.9 -0.5 WD2XES WOLFING =C2=A0-
t= :3168 f:-0.410 pm:131.7 jm:662 q: =C2=A02.1 -0.3 WD2XES WOLFING =C2=A0-
2016-02-29 01:36:12 >WOLF10 =C2=A0-r 8000 -f 700 -t 1.0 -w 0.0000=

>
>
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__._,_.___
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Posted by: Steve Elliston <sgelliston@gmail.com>
Repl= y via web post =E2=80=A2 Reply to sender =E2=80=A2 Reply to group =E2=80=A2 Start a new topic =E2=80=A2 Messages in this topic (7)
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3D"Yahoo!
=E2=80=A2 Privacy =E2=80=A2 Unsubscribe =E2=80=A2 Terms of Use

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