Ron / /Dave -
Musta missed this one!
The BAND oscillator in the 2-B has always been problematic, it's a
'two-way' circuit that operates in parallel mode on the 'fundamental'
bands and series mode on the 'overtone' ones. The 6U8 is marginal, but
usually a good 6EA8 will get one running. If
Hi gang, you too Ron,
Had a lot of fun last night. I took my TR-3 over to Terry's last night. We
found no bad components, just awfully bad alignment. It was impossible to
set the 9 Mhz oscillator the way the book calls for, so we set it with a
frequency counter, then went through the
Hi to all Drake fans:
Do you think the Drake R-4C could be modified to accommodate one of these two
class A audio amps and the graphic equalizer?
At present I don't have the schematics for these products.
Here are the three links to look at:
Chuck,
My plan is to bring audio out to an unused RCA jack that can be restored later
if necessary. I have a modified Marantz 1030 integrated amp. It's modified so
that the balance control is now a fader control. The MONO button bridges the
two channels together. Why would I do this? Part
Hi to all:Here is another link to possible class A tube/valve amps for Drake
R-4C.Do you think any of these little class A amps could be made to work in the
Drake?73,Chuck - AA5WG
http://shop.ebay.com/indeed-hi-fi-lab/m.html
___
Drakelist
Tom -
Repairing stuff is so much more fun when you have the proper test
equipment! :-)
The manual procedure only works if the radio has not been 'repaired' by
someone else! What probably happened in your case was that the 9 MHz
oscillator was 'outside' the sideband filters rather than in
For someone who doesn't own all the requisite test equipment, it would be
nice to know of competent folks in the area capable and willing to properly
align Drake gear. I'd happily pay someone to go through my 4-line, but am
not interested in shipping it anywhere.
My frequency counter is my
I find my best piece of test equipment is my R10 receiver. Can set an osc
very close to perfect, can listen to see if the osc is there, can hear if the
osc is clean, can be coupled into the receiver or TX path to hear signals to
break in half your troubleshooting path.
Although lately I have
Curt -
Nothing wrong with an Omni VII 'frequency counter'! A lot more
sensitive than any 'real' frequency counter and more than adequate for
our needs.
Depending upon what tube tester you have, you could sell it and put the
money towards a good scope. Only one or maybe two of the Heathkit
9 matches
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