I have an HP 410C that I like a lot. And, of course, an ancient Simpson 260.
From your posts it seems you're pretty good at getting your Drake stuff
working -- maybe you can apply the same ability to the Heath meter you have..
73,
-Doug, W7KF
Carey Lockhart wrote:
i am looking at several m
Carl: Another option is to build the thermostatic fan control circuit that I
published in the Summer, 1992, issue of Communications Quarterly (this
article is available on-line at J M Cherry's Virtual Drake Museum under the
"what's new" tab). My fan control circuit mounts in place of the fan socket
i am looking at several meters on ebay. most are at reasonable prices. brand
or model would be sutiable for the drake and collins gear? i had a heathkit
but is hasn't worked in some time.
--
Carey Lockhart, KC5GTT
Boerne, Tx. 78006
www.kc5gtt.com
___
Dr
On the TR7 I use a 12V fan slowed down to about 9V with 4 series silicon
diodes. Does a great job and no noise.
John K5MO
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Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist
Along the same lines (I think) I note that more and more desktop computers have
gotten away from small fans (i.e. 80 mm) and are using large fans (120 mm) and
running them at slower speeds, all in the name of reduced noise.
Hopefully, Carl, you will be able to come up with a way to mechanically
Carl,
I just installed a 24v EBM-Pabst fan on the back of my TR7. Getting 12v out of
the radio to run at about half speed. I then put a 2w 80 ohm resistor in
series to slow the fan down more yet. This is the third try at fans, and its
now nearly undetectable, but moves enough air OUT of the
Hello to the group,
Am working with my TR 5.
Initially used a R.S. fan but was way to noisy.
Read the archives. Evan K9SQG said he used 220 V. ...soo
A Boxer 230 V. with ball bearings "Pewee" starts and runs fine.
Still to noisy. Made neoprene washers for the metal to metal mount...no
help.
Phil,
Apologies to Dave, but I've had very good luck with the HC-4 element thru the
matching xfmr driving my Drakes (T4XC, TR-4C). I also have several older Hi-Z
Shures and EV's. My Shure 545S works particularly well with the Drakes. All
have pros and cons. The Heil set-up is equal to the ot
Hello PSG,
Correct regarding the impedance. Heil does offer, or used to, an impedance
matching transformer to allow the Heil elements to be used on Drake/Collins
rigs. They even sell a special cable for Drake-Collins. However, they do not
work well. I have an HM10 and it barely has enough g
Heil also sells their audio transformer separately (P/N
XT-1,$15.00 on his web site) so you can transform the mic
impedance as needed. However, I beleve you will still need
separate bias connecton for the for electret condenser
elements.
73, Gene
K1NR
On Wed, 11 Feb 2009 13:59:33 -0
The HC4 and HC5 elements in the HM10 are low impedance wheras the Drake
microphone inputs are high impedance.
Heil does make a microphone for Drake and Collins vintage radios. It has a
built in impedance changing transformer. It is known as the GMV.
John GI3KDR
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