Re: RXTXv6.1, production RXTX kit schematic / board now posted
- Hello Tony,
Ok Tony, I'll wait for the begining of the new year to place my order.
Please, could you confirm the address to send payment (cannot find any
useful information on Amqrp site ... Obsolete or moved ? )
--- In email@example.com, "Tony Parks" <raparks@...> wrote:
> Hi Jean-Francois,
> Please wait on ordering an RXTXv6.1 kit until January. At that time
a kit may be ordered via PayPal by going to your PayPal account page
and selecting the Send Money tab for sending the kit price in US $.
Be sure to state what your order is on the form that will come up and
make sure your mailing address is correct. All kit prices include
mailing costs so a RXTXv6.1 kit is a total of $33 for DX shipment.
> Thanks and 73,
> Tony KB9YIG
> ----- Original Message -----
> From: jfteste
> To: firstname.lastname@example.org
> Sent: Sunday, December 31, 2006 8:31 AM
> Subject: [softrock40] Re: RXTXv6.1, production RXTX kit schematic
/ board now posted
> Hi Tony,
> Please, could you make a brief recall on how to order and to pay.
> Thanks a lot :-)
> Best wishes for 2007 for all
> --- In email@example.com, "kb9yig" <raparks@> wrote:
> > Good Evening All,
> > The production version of the RXTX kit, the RXTXv6.1 kit, schematic
> > and board files are now posted in the RXTXv6.1 folder within the
> > v6RXTX folder which is within the v6.0 docs folder.
> > The circuit boards and all the parts for a 1000 kit run of the
> > RXTXv6.1 kit are now on order for kit shipments starting around
> > January 18. The kit price is $32 for US/Canada and $33 for DX.
> > Each price includes the mailing cost.
> > The RXTXv6.1 will be initally offered as a 40m/80m transceiver.
> > BPFs on RX and TX will cover the two bands and the PA LPF will be
> > tuned for 40m operation. Thus the RXTXv6.1 will require some
> > additional external LP filtering for 80m operation. Power output on
> > each band will be one watt for CW and SSB but should be reduced to
> > about 700 mW for high duty cycle modes such as RTTY or PSK31.
> > Circuit board size is 2.5 inches by 3.5 inches.
> > Two crystals will be provided initially in the kit, a 28.06 MHz
> > cyrstal and a 28.224 MHz crystal which will give 40m center
> > frequencies of about 7.014 MHz and 7.056 MHz. TX software tuning
> > range will be about +/-20 kHz from each center frequency. Other
> > crystals will be provided on special order at a small cost
> > over the normal kit price.
> > A new feature on the RXTXv6.1 is an audio switch and earphone
> > from the board so that the board can be used for TX and RX when
> > one soundcard line-out channel is available.
> > The RXTXv6.1 kit is the result of technical contributions from a
> > number of people in a number of different countries. Jan, G0BBL,
> > and the other members of the UK design team, (also includes M0PUB
> > and G8BTR), initiated the project and have worked to get a
> > reasonable RF output level that also meets FCC requirements for
> > purity of emissions.
> > Please hold on kit ordering until after the start of the new year.
> > Thanks to all who have expressed interest in the RXTX effort and
> > contributed to getting the kit to a production level.
> > 73,
> > Tony KB9YIG
- At 03:25 AM 12/30/2006, you wrote:
But that "filter" is going to allow a lot of stuff into the very nonlinear switch, in this case anything from 3.5 to 7.3 MHz, which will include the high power shortwave broadcast band from roughly 5.5 to 6.3 MHz. I cannot believe that will not cause problems, intermod, desens, etc.
Quite right Bill-a fact that disturbs me, but that others find this issue NOT to be a problem::>
As a weak signal enthusiast, I have a tremendous problem with tuning down to the noise level and spending a long time listening for a weak signal that isn't even on the band where you THINK you are listening::>
For my lowfer softrock, I have the front end set to admit only the lowfer band (from 160 to 190 KHz) with the filter attenuating 3 db at 160 and 190 Khz. My filter needs 5 toroids and does not fit on the softrock board, so I have the front end filter mounted on a small breadboard to accommodate the litz wire wound oversized toroids.
It's large, bulky and heavy, but I feel the bullet proof front end is a necessity, especially since the softrock does not hetrodyne the adjacent band signals out of existence as a typical superhet does.
With the QSD's response to odd harmonic signals, a sharply tuned front end seems like a necessity to me. Your mileage may vary.
PS:I'm not so sure I'd call the switch a non linear element. Although it is an active device, it is far more linear than the best diode detector you could ever hope to build::>