Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Hi Trent -
Welcome to Drake ownership.....!
Trent Bronson wrote:
*Now.....Gents, I need schooling......*
1) I am sure the original Drake ( Astatic ) 7077 microphone could be
found for an 'arm or a leg' ; will a Shure 444D work OK?
Recommendations?
The 444D is a good microphone, and will work just fine with the TR-7.
The "Impedance"switch on the bottom of the microphone should be set to
the "Hi" position unless the TR-7 has been modified. There is an
internal jumper that can be set to use a Lo impedance microphone, but
almost certainly hasn't been done.
2) Several eBay Sellers (can't trust half of them) state that the
power OUTPUT could be set to >150 watts SSB (my only mode) as long as
the cooling fans were installed on the radio and power supply. I could
use a little more punch; but I don't like to abuse gear either.
Your advice?
Yes, the output power CAN be set to >150W, but the chance of a PA or PS
failure is increased FAR MORE than the little bit of extra power gained
will make at the other end. The PA of the TR-7 is designed to be run at
~140-150W output, albeit with considerable safety margin. It will put
out close to 200W if you disable the ALC, but again NOT a good idea,
considering that even going to 200W is only a little over 1 (ONE) dB,
which is described as "minimum discernible difference" in strength.
For reference, one S-Unit is 5 or 6 dB depending upon brand. I set mine
up for 140W on 20M, and the difference between 100 and 150W is a little
less than 2 dB, again negligible.
3) I have read that there are sources for 'new' cases for the
radio. This one has the sticky paint and the previous owner put a
hole in the top near the PA grate (or is that suppose to be there?)
!!! Either way, I would like a new 'non-sticky' case. Anyone??
They appear on E-Bay fairly often. KE9PQ has had them in his online
store at
<http://www.marketworks.com/storefrontprofiles/default.aspx?sfid=86409>
has new ones on his site, although it appears to be down at the
moment. Most new cases have a black wrinkle finish, rather than the
original dark gray, but look good.
73, Garey - K4OAH
Atlanta
Drake C-Line Service Manual
<http://www.k4oah.com>
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