Re: SV: [HCDX]: Drake R8A / Icom R75

[Gert Nilsson <gert.nilsson@xxxxxxxxxxxxxxxxxx>]

Från bakre panelen räknat:
Vid antenningångarna finns 2 reläer, vid det inre reläet finns ett cirkelformat
område delat på mitten. Det finns i anslutning till 3 ytmonterade motstånd.
Området är delat mitt itu och kallas i kopplingsschemat CP171 och kortsluter
R172 (18 ohm) som ingår i en dämpsats tillsammans med 2 st 270 ohms motstånd.
Lite dämpning kvarstår säkert, resistorerna borde nog ersättas med  1mH
induktor, men vem vill löda på detta kort??

Johan.Letterstal@xxxxxxxxxxxxx wrote:

> Where, where (on the pcb)???
> 73s Johan
>
> > -----Ursprungligt meddelande-----
> > Från: Gert Nilsson [SMTP:gert.nilsson@xxxxxxxxxxxxxxxxxx]
> > Skickat:       den 20 juli 1999 16:47
> > Till: hard-core-dx@xxxxxxxxxxxxx
> > Ämne: Re: [HCDX]: Drake R8A / Icom R75
> >
> > Just bought the Service Manual on CD. It shows a 10 dB attenuator below
> > 1,6 MHz.
> > There is a CP (=connection point) where you can short it out! Easily done,
> > gives
> > some extra dB!
> >
> > There also seems to be some kind of filter calibration in the R75. Turn
> > the
> > receiver off, short the remote jack, press the ANT and CLOCK buttons and
> > turn
> > the receiver on again. With the UP and DOWN buttons you can find the
> > filter
> > calibration on the display. I have not tried it out myself! Perhaps it
> > will
> > measure the bandwidths and adjust hte BFO frequencies, ad the AOR7030
> > does? No
> > information in the Service Manual about what it really means!
> >
> > Gert Nilsson wrote:
> >
> > > The 5,6 uV sensitivity for AM is with 6 kHz bandwidth and without the
> > > preamplifier. With amplifier and e g 2,8 kHz bandwidth I think
> > sensitivity
> > > will be quite good. I think sensitivity is as good as my R71E which has
> > > compared favourably with AOR7030, R-390A, NRD 515 and NRD 525
> > >
> > > Richard Jary wrote:
> > >
> > > > I have the chance to buy either of these...a 2nd hand R8A or a new
> > R75.
> > > >
> > > > Price: Drake R8A with various bits A$1200
> > > >        Icom R75 brand new A$1390
> > > >
> > > > OK, the Icom is newer. I have read bad comments about it's audio
> > quality,
> > > > though these may be fixed by the use of an external speaker. As I am
> > also
> > > > into MW/Broadcast Band DX, I was not impressed by the R75's figures of
> > > > 5.6uV for the MW band, it appears like most receivers destined for the
> > > > US/Euro market that MW is deliberately crippled to cover the
> > overloading
> > > > problem you get there.
> > > >
> > > > Here in Oz that isn't as big a problem, and I want MW coverage. So I
> > would
> > > > like comments, especially from anyone who has compared the two on both
> > HF
> > > > & MF.
> > > >
> > > > Icom R75 - New technology
> > > >            Warranty
> > > >
> > > > Drake R8A - Better MW coverage
> > > >             Slightly cheaper
> > > >             Better audio?
> > > >
> > > > I have used a Drake R8A a few years ago on a DXpedition and found it
> > good,
> > > > but would like to compare the two.
> > > >
> > > > Richard
> > > >
> > > >
> > ------------------------------------------------------------------------
> > > > This is a message from Richard Jary <jary@xxxxxxxxxxxxxxxxxxxx>
> > > > to hard-core-dx@xxxxxxxxxxxxx list. To unsubscribe the list, send
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> > > > For more information, please check
> > http://www.kotalampi.com/hard-core-dx/
> > > > or email Risto Kotalampi, risto@xxxxxxxxxxxxxx
> > > >
> > ------------------------------------------------------------------------
> > >
> > > --
> > > Gert Nilsson
> > > gert.nilsson@xxxxxxxxxxxxxxxxxx
> > > http://home.swipnet.se/~w-38231/index.htm
> > > ------------------------------------------------------------------------
> > > This is a message from Gert Nilsson <gert.nilsson@xxxxxxxxxxxxxxxxxx>
> > > to hard-core-dx@xxxxxxxxxxxxx list. To unsubscribe the list, send
> > > "unsubscribe hard-core-dx" in mail body to majordomo@xxxxxxxxxxxxxx
> > > For more information, please check
> > http://www.kotalampi.com/hard-core-dx/
> > > or email Risto Kotalampi, risto@xxxxxxxxxxxxxx
> > > ------------------------------------------------------------------------
> >
> > --
> > Gert Nilsson
> > gert.nilsson@xxxxxxxxxxxxxxxxxx
> > http://home.swipnet.se/~w-38231/index.htm
> > ------------------------------------------------------------------------
> > This is a message from Gert Nilsson <gert.nilsson@xxxxxxxxxxxxxxxxxx>
> > to hard-core-dx@xxxxxxxxxxxxx list. To unsubscribe the list, send
> > "unsubscribe hard-core-dx" in mail body to majordomo@xxxxxxxxxxxxxx
> > For more information, please check http://www.kotalampi.com/hard-core-dx/
> > or email Risto Kotalampi, risto@xxxxxxxxxxxxxx
> > ------------------------------------------------------------------------
> ------------------------------------------------------------------------
> This is a message from Johan.Letterstal@xxxxxxxxxxxxx
> to hard-core-dx@xxxxxxxxxxxxx list. To unsubscribe the list, send
> "unsubscribe hard-core-dx" in mail body to majordomo@xxxxxxxxxxxxxx
> For more information, please check http://www.kotalampi.com/hard-core-dx/
> or email Risto Kotalampi, risto@xxxxxxxxxxxxxx
> ------------------------------------------------------------------------

--
Gert Nilsson
gert.nilsson@xxxxxxxxxxxxxxxxxx
http://home.swipnet.se/~w-38231/index.htm
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This is a message from Gert Nilsson <gert.nilsson@xxxxxxxxxxxxxxxxxx>
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For more information, please check http://www.kotalampi.com/hard-core-dx/
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