There should not be the sensitivity difference you are experiencing. My
guess is that the 4A could use an alignment. If you haven't actually tested
the tubes or done a few swaps, you might try that too.
BTW, congrats on the 4B. That is the only Drake I have and I am similarly
very pleased with
wa7...@charter.net writes:
selling them under the Philmore brand in blister packs and it was Philmore
# 3050. They
are listed as 1 diameter .
Highlight the Philmore # 3050 and search it, you have them for $ .79 each.
Carl wd8nhk
**Access 350+ FREE radio stations anytime
Chuck -
Depending upon the s/n of your R-4A, the two receivers are almost
identical, electrically. So there is a reason for the apparent difference!
1. Check the voltage, with a HIGH-Z meter, (not a cheapy DMM,) at
TP-2. On top of the chassis, under the Passband Tuner shaft. Should be
Carl -
Not exactly.. The Drake knob is 0.915 dia, and 0.750 high.
Certainly close, and probably ok if you replace them all, but
Alan's knobs are correct, made by the same company that made them
originally.
Pays your money.. :-)
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B,
- Original Message -
From: jch39_99
To: drakera...@yahoogroups.com
Sent: Saturday, April 18, 2009 9:21 AM
Subject: [DrakeRadio] FS: Complete Drake TR4CWrit Station
FS: Complete Drake TR4CWrit Station
I made a mistake. Last year I got a Drake TR7 and really liked that rig. So
Excellent suggestions, all.
I'm going to print them all out and go through it methodically.
I do have a URM-25D in good calibration.
So I'll make some notes as I go along, and note its performance before I
muck with it.
I do feel a bit foolish, when I got home and unpacked it and powered it up,
Bob -
Another one bites the dust! :-)
Select R58 so that the meter indicates 70 mA when the current is 70 mA.
Calculate actual current against actual MEASURED value of R59. Then
select nearest value resistor for correct indication. Don't worry about
meter accuracy anywhere else, not
7 matches
Mail list logo
