[hpsdr] 600 meters

[Berndt Josef Wulf]

G'day,

The problem is that PennyLane uses Mini-Circuits transformers and filters in 
the signal path that characterizes its frequency bandwidth.

Type          Designator    Nominal Frequency
===========================
TC4-1T      T1                   0.5MHz-300MHz
ADT1.5-1  T2                   0.5MHz-650MHz
TC1-1        T3                   1.5MHz-500MHz
RLP-40+   FL9                DC~56MHz
===========================

This will limit the lower frequency to around 1.5MHz; a little lower if 
insertion (final output power) and and return losses are not critical. The top 
end the frequency is determined by the RLP-40+ low pass filter at about 56Mhz. 
The results is an usable frequency spectrum of 1.5Mhz-56Mhz.

It is apparent that PennyLane was primarily designed for operation on 160m-6m 
bands. Hence, suitable replacements for transformers T1, T2 and T3 need to be 
found to extend PennyLane's frequency coverage to LF and MF bands.

I'm interested in VLF/LF/MF and will be looking for a solution to modify 
PennyLane to operate on 137kHz.

73, Berndt
VK5ABN

On 15/06/11 Jeremy McDermond wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> AFAIK, the OpenHPSDR hardware does not lock out any frequencies for
> transmit.  It's entirely a software decision on where transmission is
> allowed.  I believe there's a "band" file in PowerSDR that contains the
> appropriate frequencies.  I believe there is a discussion from a year or
> so ago about this file in the archives.
> 
> On Jun 14, 2011, at 3:18 PM, FRANCIS CARCIA wrote:
> > ***** High Performance Software Defined Radio Discussion List *****
> > 
> > hi all,
> > Today I received a 600 meter license to operate over a number of band
> > segments between 460kHz and 515 kHz. I wonder if there is a way to get
> > Penny functional over that frequency range. Frank WA1GFZ, WE2XGR/8,
> > WE2XGR/9 _______________________________________________
> > HPSDR Discussion List
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> 
> --
> Jeremy McDermond (NH6Z)
> Xenotropic Systems
> mcdermj at xenotropic.com
> 
> 
> 
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