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

[K1rqg at aol.com]

Check out UDN2987 as a substitute, 20 pin and 350 ma current. $3.30 at  
digi-key.
 
Joe
 
 
In a message dated 3/3/2011 9:43:11 P.M. Eastern Standard Time,  
phil at pharman.org writes:

*****  High Performance Software Defined Radio Discussion List *****

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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