[hpsdr] Control an FT-1000D Low Pass Filter assembly with PSDR mouse?

[Phil Harman]

Hi Tom,

Yes, that would work OK. Add a resistor between the base of the 2N2907 and
the 9v rail to make sure the transistor turns off when the Penny OC is
off.

Also check there are diodes across each of the relay coils.

73 Phil...VK6APH


> ***** High Performance Software Defined Radio Discussion List *****
>
> Thanks for the info, Joe and Phil.
>
> Yes, I need 9V high switched to the relays at 100 ma per band.  The relays
> are grounded on the board.    I see the connections coming off the Penny
> 25
> pin connector on the schematic. Also see the software toggles required.
> Good.
>
> That circuit looks good, Joe. Though after a quick look, the M54581 chip
> is
> $20 and only available from the UK.
>
> I was thinking an easier way might be to use a small 2N2907 PNP transistor
> which gets its base grounded from Penny, the collector to 9V and the
> emitter
> in series with the LP relay.  I would need one transistor per band, or
> about
> seven transistors total. Not too bad.
>
> Does this sound like it would work OK?
>
>
> Tom, K1JJ
>
>
>   _____
>
> From: K1rqg at aol.com [mailto:K1rqg at aol.com]
> Sent: Thursday, March 03, 2011 8:35 PM
> To: k1jj at comcast.net; hpsdr at lists.openhpsdr.org
> Subject: Re: [hpsdr] Control an FT-1000D Low Pass Filter assembly with
> PSDR
> mouse?
>
>
> Tom
>
> This circuit should fill the bill. Thanks to WW2R for this design.
>
> http://g4fre.com/hpsdr_high_side.pdf
>
> Just apply 9 v instead of 12 v! It drives my Yaesu FT-747 brick and
> filters.
>
> 73 de Joe K1RQG
>
>
> In a message dated 3/3/2011 8:15:11 P.M. Eastern Standard Time,
> k1jj at comcast.net writes:
>
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
>
> My plans call for using an old Yaesu FT-1000D 200W PA unit with relay
> switched LP Filters as my linear amplifier for Penny.
>
> I would like to switch bands on this low pass filter assembly using the
> mouse PSDR software band selections along with the Penny/Mercury band
> selections.
>
> Could someone advise me on the best approach to switch the 9 volt LP
> filter
> relays, 160, 75, 40, 20, 15 and 10M  using the existing output interface?
> Or do I need to build an interface?
>
> The simple alternative is to  just use a rotary band switch and switch the
> L.P filter manually.  I want to explore using the mouse auto-method first.
>
> Thanks.
>
> Tom, K1JJ
>
>
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