Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
----------------------------------------------------------------------
Hi Craig -
About the only thing the AUX-7 is used for these days is if someone
wants selectable crystal controlled frequencies for some reason. The
steering diode mod described in Drakemod 6A (and other places) is
certainly the simplest approach to just add the LF bands. Don't
overlook that you have to use the "VLF Antenna" pin on the ACCESSORIES
connector on the rear panel for reception below 1.5 MHz. This antenna
also has to be removed to transmit, since it is essentially a "bypass"
of the internal band filters.
Bottom line, there are lots simpler ways to listen to the broadcast
band! :-)
73, Garey - K4OAH
Atlanta
Drake C-Line Service Manual
<http://www.k4oah.com>
Craig Roberts wrote:
Well, I thought I had it figured out, but...
Here's my question: what's the best way to enable reception of the
LF ranges on my TR-7 given these circumstances? --
I have an AUX-7 board installed with one module aboard. It's the 0 -
500 KHz one, selectable from AUX Program switch position 1. I'd like
to leave this in place but add the 500 - 100 KHz and 1000 - 1500 KHz
ranges to switch positions 2 and 3 respectively.
I have enough DIP headers and diodes to make my own "modules" to plug
into the AUX-7 board, but have no clue how to wire the the headers
with the diodes. I've seen a programming matrix, but find it baffling.
I need a picture, 'cuz I'm a simple fellow. This also requires digging
into the bowels of the rig to get to the AUX-7 board. Drake says this
is a matter of removing the display board only. Others say the front
panel must be dropped, necessitating a delicate bandswitch shaft
extraction (which probably isn't as surgically difficult as all
that). Is there a preferred way of getting to the AUX-7 board?
A simpler way to achieve the LF coverage, it seems, would be to
install diodes on the parent board as Drake suggested. Since I already
have a module in position 1 for 0 - 500 KHz., I'd skip the group of
diodes for that range (eliminating the involvement of foil # 17). My
#10 foil, by the way, has already been severed in order to enable 1.5
- 30 MHz transmit (the WARC bands, in my case).
Does one method have any advantage over the other? The module-making
would be more cool and "techie", but the parent board diode tacking
method seems a lot simple and certainly less invasive. I generally
favor less invasive measures on radios I don't know well. Tube rigs
don't bother me, but solid-state ones with all their little delicate
thingies are a bit intimidating to me. I suppose I need to get over it!
Thanks and 73,
Craig
W3CRR
----------------------------------------------------------------------
Submissions: [email protected]
Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body
Hopelessly Lost: [EMAIL PROTECTED] - help in body of message
Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net
----------------------------------------------------------------------
