Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me02.r1000.mx.aol.com (Internet Inbound) with ESMTP id B3E2D380000BA; Thu, 31 May 2012 15:28:14 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SaB1C-0004T8-Jd for rs_out_1@blacksheep.org; Thu, 31 May 2012 20:26:46 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SaB1B-0004Sz-Ar for rsgb_lf_group@blacksheep.org; Thu, 31 May 2012 20:26:45 +0100 Received: from smtpout2.wanadoo.co.uk ([80.12.242.42] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1SaB17-00050I-7x for rsgb_lf_group@blacksheep.org; Thu, 31 May 2012 20:26:44 +0100 Received: from AGB ([2.26.29.89]) by mwinf5d17 with ME id GjSc1j0071vMfqS03jScNK; Thu, 31 May 2012 21:26:40 +0200 Message-ID: From: "Graham" To: References: <8BE4322932454ABBAF36917E7F0B7293@uwePC> <02bb01cd3eb1$c4cb1730$1502a8c0@Clemens04> <1338444302.19906.YahooMailNeo@web171605.mail.ir2.yahoo.com> <18D068A53AF74F56BF8AFDCCAB65CC62@AGB> <1338488029.92944.YahooMailNeo@web171606.mail.ir2.yahoo.com> <97F0E98E40814C45B796CFAF1351D46C@AGB> <1338490735.61897.YahooMailNeo@web171604.mail.ir2.yahoo.com> In-Reply-To: <1338490735.61897.YahooMailNeo@web171604.mail.ir2.yahoo.com> Date: Thu, 31 May 2012 20:26:36 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: avast! (VPS 120531-0, 31/05/2012), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Ok Pete Ive sent you a invite to the op group , The pic code has the call sign encoded in the pattern , so you need to use the windows software to generate the code , then copy and paste into a editor , but Andy jnt or Eddie should be able to put things right .. the mark/space and time windows are critical [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.42 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 36813054ae293c6228fb1508309ed083 Subject: Re: LF: 475 kc Exiter Content-Type: multipart/alternative; boundary="----=_NextPart_000_00B3_01CD3F6B.AD23D670" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_40_50,HTML_FONT_BIG, HTML_MESSAGE,MISSING_OUTLOOK_NAME autolearn=no version=2.63 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-aol-global-disposition: G X-AOL-SCOLL-SCORE: 1:2:479956864:93952408 X-AOL-SCOLL-URL_COUNT: 1 x-aol-sid: 3039ac1d608a4fc7c64e14fa X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_00B3_01CD3F6B.AD23D670 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Ok Pete=20 Ive sent you a invite to the op group ,=20 The pic code has the call sign encoded in the pattern , so you = need to use the windows software to generate the code , then copy = and paste into a editor , but Andy jnt or Eddie should be able to = put things right .. the mark/space and time windows are critical=20 The data is sent as a 'over layed pattern' with no start or = finish as would be expected in a normal data transmission , the = only criteria is the PIC clock needs to be 'good' to ensure the = m/s and tx time is accurate , I think 0.2 % =20 Clock accuracy is important , along with frequency stability , = not down to uHz levels , but OP32 requires +/- 1Hz over the = 32 min tx time , Op4 may be +/- 4 Hz , but the closer the = better will be the lower s/n levels , I think some of the PA = stations have old ww2 tx's which will not hold frequency , but = they may be vfo and capable of +/- 2 or 4 Hz over 4 mins=20 FB on the valves , well nothing wrong with that ! would make a = good picture for the yahoo group !. =20 73 -G.. From: M0FMT=20 Sent: Thursday, May 31, 2012 7:58 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: 475 kc Exiter Ok Graham I will try to talk to Eddie, my beacon is HB PIC built. I need to know = the type of on off keying mark / space. I will take a look at it on the = scope to see how the code is applied and see if I can emulate it in code = form.=20 Ok about power I will start at the current power level using my Lap top = and will let you know via this medium on BS and Yahoo when its up and = running plus as close as I can get the carrier frequency. I can get onto = the Opera channel using a DSS and xtal mixer but power much lower. The = xtal mixer is a valve rig using 6.50-6.00=3D.5+/- VXO PA 6CL6 tube video = bottle which I may try for a laugh (ancient and modern.....:-). =20 73 es GL Pete M0FMT IO91UX From: Graham To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, 31 May 2012, 19:25 Subject: Re: LF: 475 kc Exiter Ok Pete, Well if your set up on a different frequency , if you have a = date/ time for a transmission, stations can re tune , all we need = to know is the carrier frequency, then can work out the correct = dial frequency for RX ...... would give you a idea as to = your coverage .... thats if you can on/off key the carrier , or = is the beacon pic contolled, which case , may be the code change = would be the most simple option ? Should not need much over 10 watts ? you should find 1 watt = enough with that size of Ae=20 Not used the PIC code facility in the software , but it will = encode your call-sign for Tx , I think Eddie uses it for his = qrpp beacon, should be able to give you pointer if need be , = Andy also uses it for his LF/MF beacon=20 73 -G.. From: M0FMT=20 Sent: Thursday, May 31, 2012 7:13 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: 475 kc Exiter Hi Graham I will digest your mail and thanks for so much info. I have a beacon = that runs on 500kc/s it is not in the Opera band. It is currently at = about 10Watts O/P to an inverted "L" up about 35ft x 128ft lng, running = QRSS and 12WPM. Clearly seen on the Birmingham Grabber when on. = Initially my plan is to run Opera base upon your information. The = operating times will be dependent upon Internet usage here and reports. = I will also QSY to the Opera frequency in due course. Now you have = confirmed it is not a linear mode I will commit my lap top for a period = of time to Opera operation and increase power to 40Watts +/-. If I can = get a HEX code for a PIC then it will be on Opera more often. I will let you know the progress. Once again thanks for the info to date. 73 es GL Pete M0FMT IO91UX From: Graham To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, 31 May 2012, 17:20 Subject: Re: LF: 475 kc Exiter R Pete ! I think the answer is 42 ! There is a user group > http://groups.yahoo.com/group/O_P_E_R_A_/, = Open to all to view , with pdf in the files section outline the = data coding of the mode.=20 There is a good user guide/ intro at = http://www.obriensweb.com/operaguide.html Keying is designed round the characteristics of a CW = transmitter ,=20 There are TWO conventional and ONE Pic methods of controlling a = transmitter ,=20 A) By using the COM-Port CW keying , by way of transistor = switch , to key the Tx as per normal CW B) By audio drive from the sound-card , to SSB exciter , = producing on/off single frequency carrier. C) The windows software has a PIC code generator , that may be = used to control a PIC based 'Beacon system'=20 There is no PIC provision for the decoding of the signals=20 Transmission is by way of ON-OFF keying of a single carrier = frequency ..clever On/Off keying Magic ! Decode is possible with up-to 50% data loss , the loss can be = randomly along the TX time line , the S/N reading is calibrated = against the Sim-Path software and shows 6 dB less than wspr or = fldigi , i.e -20 s/n Opera decode , would be -26 dB using wspr = , however , the S/N is the average along the time line and not = the peak value=20 At the moment , there is no 'dedicated' data server , however the = PSK-Reporting system is able to down load data as a log-file. ( = still looking for some one to have a go at making one ) There is no need for internet linking or time locking to operate = the system , the internet provider's the distribution of the = decode data and TX beacon's are also distributed via the internet = to alert of activity. =20 Tx and Rx stations with web linking are displayed on the psk-map = as are decodes of -NON- web linked TX stations=20 The operating frequency's are defined as 'Dial set USB' , = change of mode , also changes the TX frequency , so if using = VFO/DDS etc , the correct off set must be added to ensure the = signal falls in the RX pass band ,=20 When using the windows based software , the TX carrier frequency = is placed in the lowest s/n area of the pass band , by a = scanning routine , active during reception , this is to prevent = collisions of TX's and to avoid heterodynes and other carrier = based band users. QSO mode is able to send 15 chrs using the same encoded data = system and is a live keyboard data mode. Data recovery (local) is only by cut and paste at the moment. =20 Op is the first 'Plug and Play' data / beacon mode , just = unplug the mores key and play away hihi=20 73 -G..=20 From: M0FMT=20 Sent: Thursday, May 31, 2012 7:05 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: 475 kc Exiter Hi Graham Is there any proper documentation for this Opera stuff? Like description = of the method of Keying and how the logging system works. How do you get = qso data off the application other than screen dumps which seems a bit = crude. There are software buttons but they don't all work as advertised. Can you tell me where the full documentation is kept? Can you tell me the Keying principle? I have not put the PC SC output on = the scope but there must be an easier way to get at the info. Is it FSK = or Phase shift or some clever On/Off keying or Magic? Is there a web data base or is the screen info just a one shot? Do I need an Internet connection during Beacon or QSO ing? With my = issues concerning Good Old BT and their 19th century technology, rusty = copper and wet string, in the far flung out posts of North Hertfordshire = that can't be done, so does that preclude full use of this system. Or is it all a secret and one has to dig into the application? Info in = README is sparse. Has there been any projects to put this application of PIC processor for = say TX Beacon mode? Or RX for that matter? There are more questions but any help would be of interest. Now that I = have managed to probably defeat BTs best efforts to keep me off 500kc/s = I would like to explore this mode a bit more. Thanks. 73 es GL Pete M0FMT IO91UX From: Graham To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, 31 May 2012, 0:02 Subject: Re: LF: 475 kc Exiter TX500 is not supporting WSPR or Opera Opera is a single frequency on/off CW key replacement mode , if it = can=20 send CW or QRSS , then it can send Opera via the com-port keying = facility, as many of the MF/LF stations are so doing. WSPR on the other hand is FSK based and requires , either audio>Rf=20 translation or DDS excitation , each has its own uses , the design=20 requirement / concept of Opera was a 'Data mode' ' To be sent = via a=20 normal CW Tx' G.. -------------------------------------------------- From: "Clemens Paul" Sent: Wednesday, May 30, 2012 11:15 PM To: Subject: Re: LF: 475 kc Exiter > Uwe, > > here an Email from Juma from 2/2012 1regarding further developments: > >>Hello Clemens, >>Thanks for your interest in JUMA TX500. >>TX500 is not supporting WSPR or Opera. We will consider new transmit = modes=20 >>in the future. > > 73 > Clemens > DL4RAJ > > ----- Original Message -----=20 > From: "Warren Ziegler" > To: > Sent: Wednesday, May 30, 2012 7:45 PM > Subject: Re: LF: 475 kc Exiter > > > Uwe, > > The Juma 500 is a FB little transmitter, lots of built-in features > (synthesizer, keyer, swr bridge, receive preselector, receive > converter) in a very small package. It is capable of more than 60W > out, I have run it with 15vdc (which is in-spec) and with a 30 ohm or > so antenna impedance you can get 100W out all day and all night with > no complaints. > > 73 Warren K2ORS > > > On Sun, May 27, 2012 at 3:39 AM, Uwe Wensauer = wrote: >> What do You think about the JUMA TX500 TransmitterI >> >> In my eyes a small Rig with 60 Watt and built in Converter. >> >> By the way, have a look at the filters in use =E2=80=93 easy to built = an=20 >> duplicate >> >> Uwe, dk1kq > > > > --=20 > 73 Warren K2ORS > WD2XGJ > WD2XSH/23 > WE2XEB/2 > WE2XGR/1 > > > > ----- > E-Mail ist virenfrei. > Von AVG =C3=BCberpr=C3=BCft - www.avg.de > Version: 2012.0.2178 / Virendatenbank: 2425/5033 - Ausgabedatum:=20 > 30.05.2012 > > >=20 =20 ------=_NextPart_000_00B3_01CD3F6B.AD23D670 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Ok Pete
 
Ive  sent you  a  invite  to the  op = group  ,=20
 
The   pic  code  has the  call =20 sign  encoded in the  pattern , so  you  need  = to =20 use the  windows  software to generate  the  code ,=20 then  copy  and paste into a editor , but  Andy  = jnt =20 or Eddie  should  be  able to  put  = things  right=20 .. the  mark/space  and  time windows are  critical =
 
The  data  is  sent  as  a 'over layed=20  pattern'  with  no  start or  finish as  = would=20 be  expected in a  normal  data  transmission , = the =20 only  criteria  is the  PIC clock needs to  be  = 'good'  to  ensure the  m/s and  tx  time  = is  accurate , I think  0.2 % 
 
Clock  accuracy is  important  , along =20 with   frequency  stability ,  not  down = to  =20 uHz  levels  , but  OP32  requires   = +/- =20 1Hz  over the  32 min  tx  time , Op4  = may =20 be  +/-   4 Hz  , but the  closer  = the =20 better  will  be the  lower  s/n  levels , I=20 think  some  of the  PA stations have  old  = ww2 =20 tx's which  will  not  hold frequency  , but =20 they  may  be  vfo  and capable  of  +/- = 2 =20 or  4 Hz over  4 mins
 
FB on the  valves  , well  nothing  wrong = with =20 that  ! would  make a  good picture  for the =20 yahoo  group !.  
 
73 -G..

From: M0FMT
Sent: Thursday, May 31, 2012 7:58 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: 475 kc Exiter

Ok = Graham
 
I will try to talk to Eddie, my beacon is HB PIC built. I need to know the type of on off = keying mark=20 / space. I will take a look at it on the scope to see how the code = is=20 applied and see if I can emulate it in code form.
 
Ok about power I = will start at=20 the current power level using my Lap top and will let you know via this = medium=20 on BS and Yahoo when its up and running plus as close as I can get the = carrier=20 frequency. I can get onto the Opera channel using a DSS and xtal mixer but=20 power much lower. The xtal = mixer is a=20 valve rig using 6.50-6.00=3D.5+/- VXO PA=20 6CL6 tube video bottle which I may try for a laugh (ancient and=20 modern.....:-).
 
73 es GL Pete M0FMT = IO91UX
From: Graham=20 <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org=20
Sent: Thursday, 31 = May 2012,=20 19:25
Subject: Re: = LF: 475 kc=20 Exiter

Ok Pete,
 
Well  if your  set up on a  different  = frequency =20 , if you  have a  date/ time   for a  = transmission,=20 stations can  re tune  , all  we  need  = to =20 know  is the  carrier  frequency, then  can  = work out=20 the  correct  dial  frequency  for  RX =20 ......   would  give  you  a  = idea =20 as to  your  coverage  ....  thats  if you  can on/off  key  = the =20 carrier , or  is the  beacon pic  contolled, which  case , may be  the  = code  change  would be the  most  simple  = option=20 ?
 
Should  not  need  much  over  10 = watts =20 ?   you  should  find  1 watt enough  = with =20 that  size of  Ae =
 
Not  used the  PIC  code  facility  in = the =20 software  , but  it  will  encode  your =20 call-sign   for  Tx =20 , I think  Eddie  uses it  for  his qrpp  beacon, should  be  able = to =20 give  you  pointer  if  need  be  , = Andy also=20 uses  it  for  his LF/MF=20 beacon
 
73 -G..

From: M0FMT
Sent: Thursday, May 31, 2012 7:13 PM
To: rsgb_lf_group@blacksheep.= org=20
Subject: Re: LF: 475 kc Exiter

 
Hi Graham
 
I will digest your mail and thanks for so much info. I have a = beacon=20 that runs on 500kc/s it is not in the Opera band. It is currently at = about=20 10Watts O/P to an inverted "L" up about 35ft x 128ft lng, running QRSS and=20 12WPM. Clearly seen on the Birmingham Grabber when on. Initially my plan = is to=20 run Opera base upon your information. The operating times will be = dependent=20 upon Internet usage here and reports. I will also QSY to the Opera frequency in due course. Now = you have=20 confirmed it is not a linear mode I will commit my lap top for a period = of time=20 to Opera operation and increase power to 40Watts +/-. If I can get a HEX = code=20 for a PIC then it will be on Opera more often.
 
I will let you know the progress.
 
Once again thanks for the info to date.

73 es GL Pete M0FMT IO91UX
From:=20 Graham <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org=20
Sent: Thursday, 31 = May 2012,=20 17:20
Subject: Re: = LF: 475 kc=20 Exiter

R  Pete !
 
I think the  answer is  42  !
 
There is a  user group  >  http://groups.yahoo.com/group/O_P_E_R_A_/,  = ; =20 Open to  all  to  view , with  pdf in the  files section  outline=20  the  data  coding of the  mode. 
 
There is a  good  user guide/ intro   = at   http://www.obriensweb.com/operaguide.html
 
Keying  is   designed  round  the =20 characteristics  of a  CW  transmitter ,
 
There  are  TWO conventional  and = ONE    Pic=20   methods of  controlling a transmitter  ,
 
A)    By  using the  = COM-Port  =20 CW  keying  , by way of   transistor  = switch  ,=20 to  key  the  Tx =20 as  per  normal CW
 
B)    By  audio  drive  from = the =20 sound-card , to  SSB =20 exciter , producing  on/off  single  frequency = carrier.
 
C)    The  windows  software  = has=20 a  PIC code  generator , that  may  be used to  = control  a  PIC based  'Beacon system'
 
 
There  is  no  PIC provision  for the =20 decoding  of the  signals
 
Transmission  is  by  way of   ON-OFF = keying =20 of a  single  carrier  frequency ..clever On/Off keying = Magic=20 !
 
Decode is possible  with  up-to  50% data  = loss  ,=20 the loss  can  be  randomly  along the  TX = time =20 line , the  S/N   reading  is  calibrated  = against=20 the   Sim-Path software  and shows  6 dB  less=20 than  wspr  or  fldigi   ,  i.e   = -20=20 s/n  Opera decode  , would be  -26 dB  using  = wspr  , however , the  S/N is  = the =20 average  along the  time  line  and not the  = peak =20 value
 
At the moment  , there  is  no  = 'dedicated' =20 data  server  , however the  PSK-Reporting  system  is able = to  down=20 load  data  as a  log-file. ( still looking  = for  some=20 one to have a  go at  making one )
 
There is  no  need  for  internet linking  or  time  = locking=20 to  operate  the  system  ,  the  internet provider's  the  = distribution =20 of the  decode data  and  TX beacon's  are  = also =20 distributed  via the  internet=20 to  alert of  activity.   
 
Tx  and  Rx =20 stations  with  web linking  are  displayed on the = psk-map  as  are  decodes = of =20 -NON-   web linked TX  stations
 
The  operating  frequency's  are  defined  = as  'Dial  set  USB' =20 , change of  mode  , also  changes the  TX = frequency ,=20 so  if using  VFO/DDS  etc ,  the  = correct =20 off  set  must  be  added  to  = ensure =20 the  signal  falls  in the  RX pass band ,
 
When  using the  windows  based  software , = the =20 TX carrier  frequency is placed  in the  lowest  = s/n =20 area  of the   pass  band  , by a  =20 scanning  routine  , active  during reception , = this =20 is  to  prevent  collisions of  TX's  and to  avoid  heterodynes   and  = other =20 carrier  based  band  users.
 
QSO mode  is  able = to send 15=20 chrs using the  same  encoded  = data  system and is a live  keyboard  data  = mode.
 
Data  recovery  (local) is only  by  cut  = and=20 paste  at the  moment.   
 
Op is  the  first  'Plug and Play'   = data  /=20 beacon  mode  ,   just unplug the  mores key = and =20 play   away   hihi
 
73 -G..
 
 
 
 
 

From: M0FMT
Sent: Thursday, May 31, 2012 7:05 AM
To: rsgb_lf_group@blacksheep.= org=20
Subject: Re: LF: 475 kc Exiter

Hi Graham
Is there any proper documentation for this Opera stuff? Like=20 description of the method of Keying and how the logging system works. = How do you=20 get qso data off the application other than = screen dumps=20 which seems a bit crude. There are software buttons but they don't all = work as=20 advertised.
 
Can you tell me where the full documentation is = kept?
Can you tell me the Keying principle? I have not put the PC = SC output=20 on the scope but there must be an easier way to get at the info. Is it = FSK or Phase shift or some clever On/Off = keying or=20 Magic?
Is there a web data base or is the screen info just a one=20 shot?
Do I need an Internet connection during Beacon or QSO ing? With=20 my issues concerning Good Old BT and=20 their 19th century technology, rusty = copper and=20 wet string, in the far flung out posts of North Hertfordshire that can't be done, so does = that preclude=20 full use of this system.
Or is it all a secret and one has to dig into the = application? Info=20 in README is sparse.
Has there been any projects to put this application of PIC = processor=20 for say TX Beacon mode? Or RX for that matter?
 
There are more questions but any help would be of interest. = Now that=20 I have managed to probably defeat BTs best=20 efforts to keep me off 500kc/s I would like to explore this mode a bit = more.=20 Thanks.
73 es GL Pete M0FMT IO91UX
From:=20 Graham <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org=20
Sent: Thursday, 31 = May 2012,=20 0:02
Subject: Re: LF: = 475 kc=20 Exiter

TX500 is not supporting WSPR or = Opera

Opera is=20 a single frequency  on/off    CW key replacement  = mode , if=20 it  can
send  CW or  QRSS  , then  it = can =20 send  Opera  via the  com-port keying
facility, as = many of=20 the  MF/LF  stations  are  so  = doing.

WSPR on=20 the  other  hand is  FSK based and requires , = either =20 audio>Rf
translation  or  DDS  excitation , each = has=20 its  own uses , the design
requirement /  concept  = of =20 Opera  was  a  'Data mode'  ' To be  sent via a =
normal CW=20 Tx'

G..



-------------------------------------------= -------
From:=20 "Clemens  Paul" <cpaul@gmx.net>
Sent:=20 Wednesday, May 30, 2012 11:15 PM
To: <rsgb_lf_group@blacksheep.= org>
Subject:=20 Re: LF: 475 kc Exiter

> Uwe,
>
> here an Email = from Juma=20 from 2/2012 1regarding further developments:
>
>>Hello=20 Clemens,
>>Thanks for your interest in JUMA = TX500.
>>TX500 is=20 not supporting WSPR or Opera. We will consider new transmit modes =
>>in=20 the future.
>
> 73
> Clemens
> = DL4RAJ
>
>=20 ----- Original Message -----
> From: "Warren Ziegler" <wd2xgj@gmail.com>
> To: = <rsgb_lf_group@blacksheep.= org>
>=20 Sent: Wednesday, May 30, 2012 7:45 PM
> Subject: Re: LF: 475 kc=20 Exiter
>
>
> Uwe,
>
>  The Juma 500 = is a FB=20 little transmitter, lots of built-in features
> (synthesizer, = keyer, swr=20 bridge, receive preselector, receive
> converter) in a very small = package.=20 It is capable of more than 60W
> out, I have run it with 15vdc = (which is=20 in-spec) and with a 30 ohm or
> so antenna impedance you can get = 100W out=20 all day and all night with
> no complaints.
>
> 73 = Warren=20 K2ORS
>
>
> On Sun, May 27, 2012 at 3:39 AM, Uwe = Wensauer=20 <uwe.wensauer@gmx.de>=20 wrote:
>> What do You think about the JUMA TX500=20 TransmitterI
>>
>> In my eyes a small Rig with 60 Watt = and=20 built in Converter.
>>
>> By the way, have a look at = the=20 filters in use =E2=80=93 easy to built an
>> = duplicate
>>
>>=20 Uwe, dk1kq
>
>
>
> --
> 73 Warren = K2ORS
>=20 WD2XGJ
> WD2XSH/23
> WE2XEB/2
>=20 WE2XGR/1
>
>
>
> -----
> E-Mail ist=20 virenfrei.
> Von AVG =C3=BCberpr=C3=BCft - www.avg.de
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