Thanks for reply Chris,
Ja in de Zoetermeerse polder waren (kei) harde signalen in de 17 m band te horen!
I think your 6 Watts RF?should be fine for digimode use. Or am i wrong?
I hope to experience this myself on short notice. Yesterday did first trials with the IRF510 endstage. I had 4 Watts RF out with a RTTY test signal connected. Hope to increase output level with a few Watts (increase supply voltage and adjust pi-filter) and do some real trials (hopefully 2-way comms) this weekend. Found that the IRF510 has a tendency to start oscillating when set at a higher bias-level. Should fix that too. Also found that my (bureau) desk-light when 30 cm above the VFO gets this VFO change frequency; but when Huff and Puff?circuit is connected, VFO frequency is corrected in a quick and fine way..
My appreciation for the BITX is?growing ...
Bye
Ron 73
PA2RF
vdberghak wrote:
Hi,
responding to the messages below:
- Ron, in the Netherlands, I heard also several stations with very
strong signals, form Russia but also from the States.
However, the 6 watt I have on 17 mtr is a bit little in combination
with my sloping dipole. Stations in (for example) Bulgaria are
answering: 'only outside Europe'....
- Rahul, I use a small 8 Ohm speaker (removed from an old transistor
radio). When I connect the antenna, a loud noise is comming out of
the speaker. When I receive a weak station, it is just above the
noise but at the moment a strong station enters, I really have to
turn down the volume potmeter immidiatly!
In fact, the volume is never on its maximum.
By the way, I use the real, original BC107, metal can ;-) For the
stage before the LM386 I use a BC109.
Best regards,
Chris.
> Interesting are
you using a speaker or heaphone. Secondly what
transistors are you usingBC547s or 2n3904s
> 73
> Rahul VU3WJM
>?
> Bye the way, RX signals on 17m were fine this afternoon, heard ssb
> voice, rtty, psk31 and cw. With a one-lambda (17 m) long-wire
antenna
> connected. Some signals clear enough to decode...
> Does anybody have experience with one wave-length antennas (up
till
> now I have only used half or quarter lambda ant's..)
>
> Bye bye and have a good Easter weekend (for what's left)
> Ron
> PA2RF
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