Re: LF: Nuand TVerter for MF

["Graham" <g8fzk@g8fzk.fsnet.co.uk>]

Hi Mal,

Depends what  you  want to do , the  VK transvertor , looks ok,  at $180 
Aus , + import tax , built and  tested . but its  going to  put you  'on 
frequency'  which if you  have a  class e/d amp  , with  same  channel  fets 
,,   both  P or both  N , then you  will  need  the  drive to be  x2  the 
Ae frequency  ...  [With P + N  you  can  drive at the  Ae frequency ] ..
basically .. No can do , even if the  translation oscillator is  set to 
give  say 954 KHz out  [hacked]  Any data  mode , would  have its 
modulation  'spreading'  pattern  reduced  by  'half'  due to the  divide by 
2  in the  logic drive  chain ..
Its possible to  mess about  with  x2  harmonic  amplifier  in the  drive 
chain .. but its far from ideal .. and you  have lost  the  linearity ..back 
to a leggo  station
73-G,


The  U3 is basically a  numerically controlled  master oscillator
The  control logic  has  various modes  embodied , so  you  can
set it to  Tx  on a fixed pattern   qrss / cw ,/ opera ,/ wspr , as a beacon

The RF  frequency  can be  set , so  could be  136  or   272   477 or 954 
etc so  if your  driving a  class e/d amp, that  means  you  can  enter  the 
drive  chain at  a higher  [multiple]  frequency ..
Ea5DOM is  using one to  send  wspr-2 op8 op32  complete  with  carrier  qrg 
shifts  at the  moment ,
UA3ASB  is using one as a  band hopping  HF beacon  with  1 watt

UA1ASB  UA1ASB  2200m   OPERA   0 km    11:32:20
UA1ASB  ON4LUC  80m     OPERA   1843 km 15:16:47
UA1ASB  UA1ASB  80m     OPERA   0 km    12:28:15
UA1ASB  CT7ABQ  40m     OPERA   3596 km 23:22:32
UA1ASB  GW0VLN  40m     OPERA   2139 km 17:13:21
UA1ASB  G8LCO                40m        OPERA   2060 km 14:58:03
UA1ASB  G6AVK               40m OPERA   2031 km 17:44:23
UA1ASB  F17468               40m        OPERA   2268 km 17:44:22
UA1ASB  SP7WT               40m OPERA   1098 km 17:44:23
UA1ASB  R3LW                40m OPERA   563 km  10:27:47
UA1ASB  EA3ACD  40m     OPERA   2699 km 16:21:10
UA1ASB  RW3ADB  30m     OPERA   635 km  17:25:39
EA5IHM  UA1ASB  20m     OPERA   3291 km 08:18:22
UA1ASB  UA1ASB/V        20m     OPERA   0 km    12:15:54
UA1ASB  SV8RV               20m OPERA   2526 km 13:18:16
UA1ASB  DL1IP               20m OPERA   1771 km 12:05:30

--------------------------------------------------
From: "Mal Hamilton" <g3kevmal@talktalk.net>
Sent: Saturday, January 02, 2016 4:03 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: Nuand TVerter for MF

> Looks like I will have to build one
> Looking for a good design
> What is a U3 ?
> De mal/g3kev
>
>
> Sent from my iPhone
>
> On 2 Jan 2016, at 15:18, "Graham" <g8fzk@g8fzk.fsnet.co.uk> wrote:
>
> > If Ros puts the  MF mode  back, then, yes a  good  idea , otherwise , 
> > otherwise , all you  need  to  send  CW,   RTTY  and Opera is a  divide 
> > by 4 [ OR 2  + Class e/d Pa]   , from  Top-band  and a U3  for  wspr .... 
> > psk is linear , so  that needs a  linear pa , which are  few  and  far 
> > between  on 477 , same go's for  olivia , that  needs a linear Tx/Rx path 
> > ..at the moment mfsk is about as good as it gets ..
> > Or just a U3  if  beacons' are your thing ...
> >
> > 73-G,
> >
> >
> > --------------------------------------------------
> > From: "VIGILANT Luis Fernández" <luis@vigilant.es>
> > Sent: Saturday, January 02, 2016 11:01 AM
> > To: <rsgb_lf_group@blacksheep.org>
> > Subject: Re: LF: Nuand TVerter for MF
> >
> > > Hi MF
> > >
> > > Mal. May be worth to have a look to the design by VK3XDK
> > >
> > > http://www.vk3xdk.net46.net/1_31_600M-472Khz-479Khz-Transverter-V2.html
> > >
> > > pdf here
> > >
> > > http://www.vk3xdk.net46.net/web_documents/600m_transverterv2.pdf
> > >
> > > 73 de Luis
> > > EA5DOM
> > > ________________________________________
> > > De: owner-rsgb_lf_group@blacksheep.org 
> > > [owner-rsgb_lf_group@blacksheep.org] en nombre de Graham 
> > > [g8fzk@g8fzk.fsnet.co.uk]
> > > Enviado: viernes, 1 de enero de 2016 23:43
> > > Para: rsgb_lf_group@blacksheep.org
> > > Asunto: Re: LF: Nuand TVerter for MF
> > >
> > > Looks a nice device  Mal, but ...
> > >
> > > ,  DC > 300 MHz
> > >
> > > I don't see the  full  spec , gives me the  impression it  compliments 
> > > the
> > > wide band  tx/rx
> > > which  tops out at  $1500
> > >
> > > There was a  good  tx/rx  single  board sdr demonstrated at the rsgb
> > > convention ,  uk made ,  the  cut  down  version  was  round £200 .. 
> > > have to
> > > go back over the  events  list to  pin the  name down
> > >
> > > 73-G,
> > >
> > > --------------------------------------------------
> > > From: "Mal Hamilton" <g3kevmal@talktalk.net>
> > > Sent: Friday, January 01, 2016 9:52 PM
> > > To: <rsgb_lf_group@blacksheep.org>
> > > Subject: LF: Nuand TVerter for MF
> > >
> > > > MF
> > > > Does anyone use the Nuand TVerter
> > > > If so is it any good?
> > > > 73
> > > > Mal/g3kev
> > > >
> > > >
> > > > Sent from my iPhone