Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HTML_MESSAGE,LOTS_OF_MONEY,SPF_PASS,T_DKIM_INVALID,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: INFN-TO: mailn 1233; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v88KcjKb011475 for ; Fri, 8 Sep 2017 22:38:47 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dqPxX-00075d-Rh for rs_out_1@blacksheep.org; Fri, 08 Sep 2017 21:33:03 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dqPw1-00075S-Pf for rsgb_lf_group@blacksheep.org; Fri, 08 Sep 2017 21:31:29 +0100 Received: from smtp-out-no.shaw.ca ([64.59.134.12]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dqPvv-0006QZ-T8 for rsgb_lf_group@blacksheep.org; Fri, 08 Sep 2017 21:31:26 +0100 Received: from cds110.dcs.int.inet ([10.0.153.158]) by shaw.ca with SMTP id qPvqdEAlPM9gtqPvrdmqO0; Fri, 08 Sep 2017 14:31:19 -0600 X-DKIM-Result: Domain=shaw.ca Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shaw.ca; s=s20150330; t=1504902679; bh=5d1VpIDD7N05bDW1fZ842VF9ri4eQ+8stlK/xloRV5Y=; h=Date:From:To:In-Reply-To:References:Subject; b=ctL9xBj7SbsTEVoBkFdrG1vZJ6qe0Q4hqX0n0+XvF1wwO04d1WSaoobQllCXePReS PnPsM3PktSEZtW1xcBP1YyPYaLafs02rMDkMY+pFsgort+USmudFHfScxJUYJCE+ze BNtCcObTJvmKau2KjShIExkPYWJHTfw+Osdexkd1r0L0GMZNeU7kGlGSlxEaB26wxu L2CwdhS9KyGBhAovM2DwAIOQOnVYxOxq69o2usXWS1Nm4Ti2ybzkGNQuFa08Ijuu20 dnOi3abtqPRWNrSepA/J/UJxYt6JQoBNfZJPVPvz0fh+ULQgNc2XV1+S4iqbCjqvdy 8joKv6HmLfq+A== X-Authority-Analysis: v=2.2 cv=a+JAzQaF c=1 sm=1 tr=0 a=waJNmSTfdSAeIyX21TZnUA==:117 a=FKkrIqjQGGEA:10 a=d_JjZ9m1VnQA:10 a=x7bEGLp0ZPQA:10 a=PIcIyvEiAAAA:8 a=F3M5lZpKAAAA:8 a=C31W_WeLAAAA:8 a=pjdaNNIBAAAA:8 a=_Dj-zB-qAAAA:8 a=vggBfdFIAAAA:8 a=HG1Ahclc-XBEPGvHAOwA:9 a=o-b2t2KprlM4FhZJ:21 a=djtVEVMDRKO-gOyi:21 a=QEXdDO2ut3YA:10 a=wJEB6GBnoWQA:10 a=bktnwPtbbC5FqfUdnKYA:9 a=HEyeXfs3xojd-G3s:21 a=_W_S_7VecoQA:10 a=4GG6-yNYYmL8Jmn9ibRK:22 a=slCku8JSH3TyizEDQ3pD:22 a=EXMPwiTf_C2VfM_AGrEE:22 a=c-cOe7UV8MviEfHuAVEQ:22 Date: Fri, 8 Sep 2017 14:31:18 -0600 (MDT) From: JACK ASKEW To: rsgb lf group Message-ID: <820195078.82708790.1504902678508.JavaMail.zimbra@shaw.ca> In-Reply-To: References: <841263318.72773699.1504557723219.JavaMail.zimbra@shaw.ca> <59AE7965.8000504@posteo.de> <1277674040.76642507.1504710766474.JavaMail.zimbra@shaw.ca> <59B10611.7070808@posteo.de> <1209197745.82227178.1504891025448.JavaMail.zimbra@shaw.ca> MIME-Version: 1.0 X-Originating-IP: [96.54.64.165, 96.50.18.135] X-Mailer: Zimbra 8.6.0_GA_1200 (ZimbraWebClient - FF55 (Win)/8.6.0_GA_1200) Thread-Topic: getting on 8.970kHz Thread-Index: cY9iv0q3+BmOV8gbx36kvxFwMzHdgw== X-CMAE-Envelope: MS4wfH0q4o+gKJfNJOHhyUJeoopUtl7vfLmUqiMCcpdeLu42k1R+L/6Mcan81P08z/JY1zfd6aGqyyfcgyxDbHiYETuhz+WhcRqVbgpNxvvZsnE84feWMNag R8D/6GGEeypo+QUH/QQbukn2tRn4/Ynuraeu8y6FGNzLXRvayHMOEIWAe5tYAvcc5hF4V1tElUjs2w== X-Scan-Signature: 882bdeb3d60c37e569eb1f790f5c4a0f Subject: Re: VLF: getting on 8.970kHz Content-Type: multipart/alternative; boundary="----=_Part_82708789_136526621.1504902678508" 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 2.75 Status: O X-Status: X-Keywords: X-UID: 12554 ------=_Part_82708789_136526621.1504902678508 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Jacek, Thanks for that helpful information on the neo-7m modules. Jack From: "Jacek Lipkowski" To: "rsgb lf group" Sent: Friday, September 8, 2017 12:49:58 PM Subject: Re: VLF: getting on 8.970kHz look for ublox neo-7m modules. they will go over 10MHz (neo-6m modules will generate <1kHz). they were avaliable on dx.com, ebay.com and other auction sites. these will work <10MHz (according to manufacturer specs, they will go higher). they can be used for generating a signal directly (it's an NCO with 48MHz reference, so try to use frequencies 48MHz/(integer value) for best spectrum purity), or as a reference for ebsynth the neo-7m modules are very cheap (abt 10 euro). then only problem with them is that they don't have a tcxo (blowing compressed air at them will cause them to loose sync) jacek On Fri, 8 Sep 2017, JACK ASKEW wrote: > Date: Fri, 8 Sep 2017 11:17:05 -0600 (MDT) > From: JACK ASKEW > Reply-To: rsgb_lf_group@blacksheep.org > To: rsgb lf group > Subject: Re: VLF: getting on 8.970kHz > > Hi Stefan > > It appears that Amazon will not ship that XCSourse GPS Locating Module NEO-6M to Canada. > I questioned XCSource why this is so and I'm waiting back for an alternate or answer from > them. There might be another choice out there that does but have not come across it as > yet. > > 73, Jack - VA7JX > > __________________________________________________________________________________________ > From: "DK7FC" > To: "rsgb lf group" > Sent: Thursday, September 7, 2017 1:40:49 AM > Subject: Re: VLF: getting on 8.970kHz > > Hi Jack, > > Ok, so i'm continuing to write on the reflector. It is not at all a waste of time to read > the conversation. Most potential newcomers are in a similar situation like you and they > may be interested to see that there are more stations considering to get on the air down > there, world wide! For example, IK1HSS tried to receive my VLF carrier transmission, but > no one knows, except me. Sharing thoughts can never be a waste of time. Don't we all have > loads of time available anyway? As long as someone own a TV, there must be more time than > needed :-)... > > Now, forget the loop for VLF transmissions. Your inv-L will give a very good radiator for > VLF! Important parameters are height and capacity, you know. In the first steps you don't > need QRO. 100 W from a normal audio PA is sufficient because the voltages will be very > high! At 250 W on 8270 Hz i'm getting about 30 kV across the wire. Your wire and the > isolators have to withstand that voltage. If the wire is to small, there will be partial > discharges. It makes no sense to run 1 kW then. It would rather make sense to use a bigger > wire or even more wire (capacity).... The first thing to concentrate on is a stable signal > generator using 1 PPS. > Buy that one for example:https://www.amazon.com/XCSOURCE-Locating-Aircraft-Controller-TE624/dp/B01N2GK1YK/ref=sr_1 > _6?ie=UTF8&qid=1504772304&sr=8-6&keywords=neo-6m > > You seem to have a high antenna capacity which is a big advantage. It is very promising > that you can radiate a very strong signal. There is no time to loose! > For the coil i suggest to use a single layer coil using 0.4 mm or even 0.6 mm diameter > wire on a tube with 0.3 m diameter or higher. It depends on the space you have for placing > the coil. It should stay dry all the time! > You need patience to wind it but it is very relaxing. :-) > > I recommend to build an analog amperemeter covering 0...1 A antenna current. It is trivial > to build it. Just use a bridge rectifier out of fast switching diodes such as UF5404 and > connect the meter to the DC side. The AC side is connected between coil and ground. > The coil is for compensating the capacitive component of the wire. The residual resistive > component is transformed to the PA output impedance using a big ferrite transformer > (toroid) which also provides galvanic decoupling. > > Now, just order the GPS module, the wire and search for a suitable coil body :-) > > 73, Stefan > > PS: With that antenna, you can become the strongest amateur VLF station! > > > Am 06.09.2017 17:12, schrieb JACK ASKEW: > Hi Stefan > > Thanks for the reply. Sorry to hear that my ERP will be so little with this setup. > A few 10dBs is a lot, I had no idea it would be that much. I just assumed I could > make up the difference by running a much larger audio amplifier. It would no be > hard to put 1KW amplifier on with the availability of some cheap 12V car amps now > available. But maybe this might not be enough power. > > For MF I'm currently using a inverted L ~73m long, 24m of that has 3 wires as a top > hat, but hopefully will be increasing that soon. The height of the antenna is ~24m > at one end and >36m at the farthest end. The Tx is a HB set up with 4 FETs running > class D, capable of 1KW but I have not pushed it that far as yet. I have been > limiting it to ~300W for local contacts between here and stations South of the > Island. I use an Icom R75 receiver for receiving, it seems to work very well on MF. > Best heard DX so far on WSPR is ZL2BCG and VK4YB. > > I was hoping you would say that QRSS240 would work with this limited budget set up. > It doesn't sound like I need to proceed much further unless I can find a much larger > audio power amplifier, a lot of patience, a lot of luck and a good GPS receiver. I > did look at a few of the NEO-6M GPS units, but not sure which one on Amazon you were > referring to. > > I agree maybe I could go on the reflector with our conversations, however since > using even moderate size loop on this dreamer's band does not look realistic, > perhaps it would be a waste of everyone's time? > I'll play with it for a few more days if things don't improve I'll pack it all up. > > Thanks for your help Stefan. > 73, Jack - VA7JX > > > __________________________________________________________________________________________ > From: "DK7FC" > To: "Jack Askew" > Sent: Tuesday, September 5, 2017 3:16:05 AM > Subject: Re: getting on 8.970kHz > > Hi Jack, > > Can we do the conversation on the reflector maybe? There is little activity and each > conversation may help to rise some inspiration to lead to an increased activity... > Your decision, just reply to the reflector in the next answer if you like. > > Well, i understood the procedure you're describing and this is of course the way to > go for getting a resonance on the desired frequency. > But, the ERP will be so little with this setup, i guess you are a few 10 dB away > from leaving a trace on VE7SLs site. > > Which antenna are you using for LF and MF? A typical top loaded vertical antenna > will give you the best results on VLF as well. What is the capacity of that antenna, > in pF? > But i understand, a loop is much easier to match on that frequency, easier than > winding a large coil :-) But if you want to cross 186 km, which is a serious > distance already, you will need to large coil and several kV across the antenna! > Furthermore you won't manage QRSS240 on that band. QRSS 240000 is more realistic! > That means, you need a receiver and transmitter that has the necessary stability. > The cheapest and best way to go is using a GPS module like NEO-6M, which is > available from Amazon. It provides a PPS pulse which must be fed into the mic input > of the soundcard. Together with SpecLab you can generate a perfectly stable tone > then, as well as DFCW, QRSS, EbNaut, etc.... The same must be used on the RX site. > > It is also helpful to do local tests, maybe with a notebook, in > 1...2...3...4...5...6 km distance, just to get an impression... > > What do you think? > > I would say you can build the system from junk box parts mostly, that the advantace > to the activity on the other end of the spectrum :-) > > 73, Stefan > > Am 04.09.2017 22:42, schrieb JACK ASKEW: > Hi Stefan > > I'm having problems finding your right email, so if you get this twice I > apologize. > > I have been trying to get a signal on 8.970kHz but with little success. Since > I'm on a limited budget, I have decide to try a large coaxial loop instead of > a large coil. I chose RG-59 coax (center and shield) since it has a low > resistance as appose to copper wire. The bottom of the loop is only ~10m off > the ground but the top side is ~21m up, circumference is ~76m. The mid point > goes down to a matching box consisting of a pc board with HV caps and a > FT-240-78 core with a sec and pri winding. The primary is 11T of of #14 ins > wire and a secondary of #18 awg enamel wire with 55T which connects to a > chassis mount SO239 for the coax which goes back to the Tx amp ~30m away. The > HV caps totaled 2.86uF and is in series with one side of the coax loop. The > loop measured 100uH, so the combined capacitors plus the 100uH loop seemed to > be close to the calculated values, but I think it could have been higher. The > Tx is a simple 140W audio amp driven by a Windows free downloaded program > called Audio Measuring Systems. I measured 2A of RF using a calibrated RF > ammeter. The same meter was used to select the capacitor values for maximum > O/P. I tried using a scopematch designed for .475 MHz but I guess the toroid > across the internal coax line is too lossy as it gets warm and besides the > current reading was very low compared to the voltage. > I don't know how far I can Tx yet. Steve, VE7SL has tried to receive me, he > is ~186 km and used a Perseus receiver with ~24Hz BW and QRSS 240 but no luck > so far. > We think we might have too low of a EIRP for that distance. > Is there any other way of optimizing the RF O/P besides using a RF ammeter? > Your thoughts on this would be much appreciated. > Thanks in advance. > 73, > Jack Askew - VA7JX > > > > > ------=_Part_82708789_136526621.1504902678508 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Jacek,
<= br data-mce-bogus=3D"1">
Thanks for that helpful information on t= he neo-7m modules.

Jack
<= /div>

From: "Jacek Lipkowski" <sq5bpf@lipkowski.= org>
To: "rsgb lf group" <rsgb_lf_group@blacksheep.org><= br>Sent: Friday, September 8, 2017 12:49:58 PM
Subject: Re= : VLF: getting on 8.970kHz

look for ublox neo-7m modules. they will go over 10MHz (neo-6m modules will generate <1kHz). they were avaliable on dx.com, ebay.com and othe= r
auction sites. these will work <10MHz (according to manufacturer s= pecs,
they will go higher). they can be used for generating a signal di= rectly
(it's an NCO with 48MHz reference, so try to use frequencies 48MHz/(integer value) for best spectrum purity), or as a reference for ebsynth

the neo-7m modules are very cheap (abt 10 euro). then only = problem with
them is that they don't have a tcxo (blowing compressed ai= r at them will
cause them to loose sync)

jacek


On Fri= , 8 Sep 2017, JACK ASKEW wrote:

> Date: Fri, 8 Sep 2017 11:17:05 = -0600 (MDT)
> From: JACK ASKEW <va7jx@shaw.ca>
> Reply-To= : rsgb_lf_group@blacksheep.org
> To: rsgb lf group <rsgb_lf_group@= blacksheep.org>
> Subject: Re: VLF: getting on 8.970kHz
> > Hi Stefan
>
> It appears that Amazon will not ship that= XCSourse GPS Locating Module NEO-6M to Canada. 
> I questioned = XCSource why this is so and I'm waiting back for an alternate or answer fro= m
> them.  There might be another choice out there that does but= have not come across it as
> yet.
>
> 73, Jack - VA7JX<= br>>
> __________________________________________________________= ________________________________
> From: "DK7FC" <selberdenken@pos= teo.de>
> To: "rsgb lf group" <rsgb_lf_group@blacksheep.org>=
> Sent: Thursday, September 7, 2017 1:40:49 AM
> Subject: Re: = VLF: getting on 8.970kHz
>
> Hi Jack,
>
> Ok, so = i'm continuing to write on the reflector. It is not at all a waste of time = to read
> the conversation. Most potential newcomers are in a similar= situation like you and they
> may be interested to see that there ar= e more stations considering to get on the air down
> there, world wid= e! For example, IK1HSS tried to receive my VLF carrier transmission, but> no one knows, except me. Sharing thoughts can never be a waste of tim= e. Don't we all have
> loads of time available anyway? As long as som= eone own a TV, there must be more time than
> needed :-)...
> <= br>> Now, forget the loop for VLF transmissions. Your inv-L will give a = very good radiator for
> VLF! Important parameters are height and cap= acity, you know. In the first steps you don't
> need QRO. 100 W from = a normal audio PA is sufficient because the voltages will be very
> h= igh! At 250 W on 8270 Hz i'm getting about 30 kV across the wire. Your wire= and the
> isolators have to withstand that voltage. If the wire is t= o small, there will be partial
> discharges. It makes no sense to run= 1 kW then. It would rather make sense to use a bigger
> wire or even= more wire (capacity).... The first thing to concentrate on is a stable sig= nal
> generator using 1 PPS.
> Buy that one for example:https:/= /www.amazon.com/XCSOURCE-Locating-Aircraft-Controller-TE624/dp/B01N2GK1YK/r= ef=3Dsr_1
> _6?ie=3DUTF8&qid=3D1504772304&sr=3D8-6&keywor= ds=3Dneo-6m
>
> You seem to have a high antenna capacity which= is a big advantage. It is very promising
> that you can radiate a ve= ry strong signal. There is no time to loose!
> For the coil i suggest= to use a single layer coil using 0.4 mm or even 0.6 mm diameter
> wi= re on a tube with 0.3 m diameter or higher. It depends on the space you hav= e for placing
> the coil. It should stay dry all the time!
> Yo= u need patience to wind it but it is very relaxing. :-)
>
> I = recommend to build an analog amperemeter covering 0...1 A antenna current. = It is trivial
> to build it. Just use a bridge rectifier out of fast = switching diodes such as UF5404 and
> connect the meter to the DC sid= e. The AC side is connected between coil and ground.
> The coil is fo= r compensating the capacitive component of the wire. The residual resistive=
> component is transformed to the PA output impedance using a big fe= rrite transformer
> (toroid) which also provides galvanic decoupling.=
>
> Now, just order the GPS module, the wire and search for a= suitable coil body :-)
>
> 73, Stefan
>
> PS: Wi= th that antenna, you can become the strongest amateur VLF station!
> =
>
> Am 06.09.2017 17:12, schrieb JACK ASKEW:
>   &= nbsp;   Hi Stefan
>
> Thanks for the reply.  Sorry t= o hear that my ERP will be so little with this setup. 
> A few 1= 0dBs is a lot, I had no idea it would be that much.  I just assumed I = could
> make up the difference by running a much larger audio amplifi= er.  It would no be
> hard to put 1KW amplifier on with the avai= lability of some cheap 12V car amps now
> available.  But maybe = this might not be enough power.
>
> For MF I'm currently using= a inverted L ~73m long, 24m of that has 3 wires as a top
> hat, but = hopefully will be increasing that soon.  The height of the antenna is = ~24m
> at one end and >36m at the farthest end.  The Tx is a = HB set up with 4 FETs running
> class D, capable of 1KW but I have no= t pushed it that far as yet.   I have been
> limiting it to= ~300W for local contacts between here and stations South of the
> Is= land.  I use an Icom R75 receiver for receiving, it seems to work very= well on MF.
> Best heard DX so far on WSPR is ZL2BCG and VK4YB.
&= gt;
> I was hoping you would say that QRSS240 would work with this l= imited budget set up.
> It doesn't sound like I need to proceed much = further unless I can find a much larger
> audio power amplifier, a lo= t of patience, a lot of luck and a good GPS receiver.  I
> did l= ook at a few of the NEO-6M GPS units, but not sure which one on Amazon= you were
> referring to.
>
> I agree maybe I could go o= n the reflector with our conversations, however since
> using even mo= derate size loop on this dreamer's band does not look realistic,
> pe= rhaps it would be a waste of everyone's time?
> I'll play with it for= a few more days if things don't improve I'll pack it all up.
>
&= gt; Thanks for your help Stefan.
> 73, Jack - VA7JX
>
> =
> __________________________________________________________________= ________________________
> From: "DK7FC" <selberdenken@posteo.de&g= t;
> To: "Jack Askew" <va7jx@shaw.ca>
> Sent: Tuesday, Se= ptember 5, 2017 3:16:05 AM
> Subject: Re: getting on 8.970kHz
>=
> Hi Jack,
>
> Can we do the conversation on the refle= ctor maybe? There is little activity and each
> conversation may help= to rise some inspiration to lead to an increased activity...
> Your = decision, just reply to the reflector in the next answer if you like.
&g= t;
> Well, i understood the procedure you're describing and this is = of course the way to
> go for getting a resonance on the desired freq= uency.
> But, the ERP will be so little with this setup, i guess you = are a few 10 dB away
> from leaving a trace on VE7SLs site.
> <= br>> Which antenna are you using for LF and MF? A typical top loaded ver= tical antenna
> will give you the best results on VLF as well. What i= s the capacity of that antenna,
> in pF?
> But i understand, a = loop is much easier to match on that frequency, easier than
> winding= a large coil :-) But if you want to cross 186 km, which is a serious
&g= t; distance already, you will need to large coil and several kV across the = antenna!
> Furthermore you won't manage QRSS240 on that band. QRSS 24= 0000 is more realistic!
> That means, you need a receiver and transmi= tter that has the necessary stability.
> The cheapest and best way to= go is using a GPS module like NEO-6M, which is
> available from Amaz= on. It provides a PPS pulse which must be fed into the mic input
> of= the soundcard. Together with SpecLab you can generate a perfectly stable t= one
> then, as well as DFCW, QRSS, EbNaut, etc.... The same must be u= sed on the RX site.
>
> It is also helpful to do local tests, = maybe with a notebook, in
> 1...2...3...4...5...6 km distance, just t= o get an impression...
>
> What do you think?
>
>= I would say you can build the system from junk box parts mostly, that the = advantace
> to the activity on the other end of the spectrum :-)
&= gt;
> 73, Stefan
>
> Am 04.09.2017 22:42, schrieb JACK = ASKEW:
>       Hi Stefan
>
> I'm having p= roblems finding your right email, so if you get this twice I
> apolog= ize. 
>
> I have been trying to get a signal on 8.970kHz = but with little success.  Since
> I'm on a limited budget, I hav= e decide to try a large coaxial loop instead of
> a large coil. I cho= se RG-59 coax (center and shield) since it has a low
> resistance as = appose to copper wire. The bottom of the loop is only ~10m off
> the = ground but the top side is ~21m up, circumference is ~76m. The mid point> goes down to a matching box consisting of a pc board with HV caps and= a
> FT-240-78 core with a sec and pri winding. The primary is 11T of= of #14 ins
> wire and a secondary of #18 awg enamel wire with 55T wh= ich connects to a
> chassis mount SO239 for the coax which goes back = to the Tx amp ~30m away.  The
> HV caps totaled 2.86uF and is in= series with one side of the coax loop. The
> loop measured 100uH, so= the combined capacitors plus the 100uH loop seemed to
> be close to = the calculated values, but I think it could have been higher. The
> T= x is a simple 140W audio amp driven by a Windows free downloaded program> called Audio Measuring Systems.  I measured 2A of RF using a cal= ibrated RF
> ammeter. The same meter was used to select the capacitor= values for maximum
> O/P.  I tried using a scopematch designed = for .475 MHz but I guess the toroid
> across the internal coax line i= s too lossy as it gets warm and besides the
> current reading was ver= y low compared to the voltage. 
> I don't know how far I can Tx = yet.  Steve, VE7SL has tried to receive me, he
> is ~186 km and = used a Perseus receiver with ~24Hz BW and QRSS 240 but no luck
> so f= ar.
> We think we might have too low of a EIRP for that distance.
= > Is there any other way of optimizing the RF O/P besides using a RF amm= eter?
> Your thoughts on this would be much appreciated.
> Than= ks in advance.
> 73,
> Jack Askew - VA7JX
>
>
= >
>
>
------=_Part_82708789_136526621.1504902678508--