I replaced the speaker in my MS-4 with one at the bottom of this page.
It is a little expensive ($26) but it is a drop in replacement and it
sounds great.
The part number is:
(COL) SPKR-4-57
http://www.surplussales.com/Microphones-Audio/MicroAudio-8.html
73,
Bob K6GGO
I need to replace
'forever'.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
www.k4oah.com
Robert Fish wrote:
I have been thinking about using my C-line for the RTTY contest this
weekend.
How do I set the transmit audio (gain) level. Do I set it the same
I have been thinking about using my C-line for the RTTY contest this
weekend.
How do I set the transmit audio (gain) level. Do I set it the same as
SSB where
the peaks are about 150ma? I am not set up here for FSK, so its going to
be a sound card affair.
Any general advice for C-line RTTY?
Hi Guys,
I was tuning around on 15 meter CW this morning and I had my Ipad handy,
so I made another video. (Oh no, not another one).
This one is shorter. With all the recent discussion of the Sherwood mods
I demonstrated the 600hz cw filter somewhat.
The band wasn't crowded enough to
Is the lesson, never trust your older brother?
Bob K6GGO
How I learned to be paranoid with cleaning agents:
When I was a mere teen-ager, I decided to clean the mode switch in my HW-101
with some contact cleaner that my brother had brought home from work. I hosed
the switch down well, waited a
Hi Guys,
I am not sure how good the print quality is, but the entire collection
of HR magazine (or most of) has recently been made available for
download in PDF or just about any format you chose here:
http://www.archive.org/search.php?query=collection%3Aham-radio-magazinesort=-publicdate
a schematic. I will
take another look at Ron's site.
Thanks again,
Bob K6GGO
Hi Bob:
Before jumping right to looking for a flaky component, have you done
the requisite re-seating of the board? Deoxit on the edge connector,
and relay cleaning?
FWIW
Curt
KU8L
On 12/20/2011 3:15 PM, Robert
I found the schematic on Ron's site. Thanks Lee.
Bob K6GGO
Hi Guys,
Thanks for the replies. The first thing I thought to do was re-seat
the boards and I did. Well, I didn't re-seat the ones that were hidden
under
the display board (DR-7). I'll take it apart and re-seat them if I
have to,
Well, it seems that the first transistor on the driver board is the
culprit. Or, at least, when the transmitter fails, that is where the RF
stops. It is a Motorola MPS-H20
I found the schematic on Ron's site. Thanks Lee.
Bob K6GGO
Hi Guys,
Thanks for the replies. The first thing I thought to
Sorry about that, I sent the e-mail before I was done typing. Does
anyone have source for an MPS-H20. It looks like they aren't available.
I found a reference to it on the Drake mods
document. The guy says he replaces them with MRF237 because it can
handle a little extra power. Apparently, he
Hi Ron,
I asked a similar question recently about SSB QRP with Drake equipment.
I think some of the thread applies to CW.
As usual, Garey and Jim provided good info. Here's the link:
http://www.mail-archive.com/drakelist@zerobeat.net/msg17173.html
73,
Bob K6GGO
Hello,
I wonder if anyone
Hi Guys,
My wife bought me an Ipad recently. I used it to make a you tube video
of my latest project and a little shack tour.
It is Drake related indirectly. Here is the link:
http://www.youtube.com/watch?v=_3LSM-sGxxI
Don't worry this isn't spam, it's really from me.
Bob K6GGO
Hi Steve,
I would probably just go to the local hardware store and pick out a
spring that is a bit on the loose (less tension) side and clip a couple
of turns at a time off of it until it was
the proper tension. Then just bend down the last loop and hook it. I was
a field service tech for
I forgot to add, use an old pair of dikes for clipping turns off of a
spring. It will ruin a pair of dikes in no time. (don't ask me how I know)
Bob K6GGO
Hi Steve,
I would probably just go to the local hardware store and pick out a
spring that is a bit on the loose (less tension) side and
This has all been a most interesting exercise, nonetheless---I only
hope that my ramblings herein have NOT inspired readers to unsubscribe
from the list..!
On the contrary, Eddy. I find this stuff fascinating. The most
productive learning environments always have people who say things like,
I have one, Pete. Are you good on QRZ.com?
Bob K6GGO
I am missing a 40M crystal for my T4XB. Any one have a spare crystal
for sale. My Zip is 98368.
I have a 30M Crystal (21.1 MHz) and would also consider a swap.
Thanks,
Pete N6QW
___
Drakelist
Hi Guys,
As some of you guys know, the ARRL sweepstakes phone contest starts in a
few hours. It looks like I am going to have to some time this weekend to
play radio.
This is, pretty much, an exclusively US and Canada contest. I usually
only compete in the CW contests if at all, but I was
a resistive pad to
lower to the desired level.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
www.k4oah.com
Robert Fish wrote:
Hi Guys,
As some of you guys know, the ARRL sweepstakes phone contest starts
in a few hours. It looks like I am
I was listening to 10 meters this morning on the C-Line, but the band
seemed dead. (great propagation numbers but no sigs, just some guy from
Texas sending CQ). So I decided to switch to 15 to look around. The
calibration on 10 meters is off by 5kc or so. So I have to recalibrate
the dial when
Hi Guys,
My wife would probably say that the word unbalanced should appear in the
subject line of all my correspondence. However, in this case I am
refering to a T-4XB.
All this talk from Steve and the other guys about restoring their B-Line
gear got me to thinking about the B-line I have
Hi Guys,
I have good news to report. I have the PTO back in the T-4XC and it is
working fine. It turned out to be the hardened grease in the PTO ball
bearings causing the chirp and warbling after all. It didn't seem to be
a plausible cause to me for the symptoms I was experiencing. But before
I meant Dogbone caps, not horseshoe. Sheesh.
Hi Guys,
Here is an update on my T-4XC PTO adventure. I eventually removed the
PTO from the transmitter and put it in a panavise on my bench, powered
it up and listened to it on my TR-7 with a sniffer wire. While
monitoring the tone, I tapped on
Hi Guys,
I have been ignoring an issue with my T-4XC until recently. When I use
the R-4C PTO to control the receiver it seems to work fine.
When I use the T-4XC PTO to control the receiver I get sort of a chirpy,
jumping around of the cw signal I am trying to copy. Both units
work fine in
K6GGO
*/Hi Bob,/*
Don't even /START/me on this topic!!! * : )*
*/~73~ de Eddy VE3CUI - VE3XZ/*
*
On 2011-10-26, at 10:32 AM, Robert Fish wrote:
Hi Guys,
I have been ignoring an issue
Garey, Eddy, Paul, Curt and Steve,
Thanks for the quick replies guys. This is a great bunch on this list. I
am convinced that it is the PTO. If I lightly tap on the PTO can with a
pencil tip (and I mean very lightly) it causes the signal to jump
around. Maybe just a cold solder joint. I have
Hi Pete,
This guy has a multi-section cap available for the T-4XB. It looks like
it may be the correct cap (similar values). I have not done business
with him, but I have heard good things about him.
http://www.hayseedhamfest.com/capinfoT4X.htm
Good Luck 73,
Bob
I am in the process of
I've never tried this, but couldn't you just clip the leads off of a cap
or resistor from your junk box and solder them on to the end caps of a
regular 8a fuse. You would certainly reflow the inside connection but as
long as you still have continuity when your done, no harm no foul. I
wouldn't
Hi Guys,
I have an IQPro VFO that I built for a Direct conversion receiver I am
building. It is a 9854 based DDS VFO designed by Craig AA0ZZ. I have
decided to go a different route with the DC receiver LO.
That leaves me with a perfectly good VFO to find a use for. I thought
that maybe it
Hi Gary and all,
I have the B-line and C-line cd's. I don't see a troubleshooting sheet
in there on either one. Does one exist for the C-line and b-line
transmitters.
I have often wondered what levels I should be seeing at the various
stages of my T-4XB and T-4XC. Do the p-p levels you mention
'RTFCD!!'
This actually made me laugh before I had my coffee this morning, very
unusual indeed. Definitely words to live by.
Bob K6GGO
Steve -
Um, if you would bother to look at your B-Line CD, in the MISC
directory, there is a file called 'PB Tuner Mechanical'. Hidden in
there is a
Hi Steve,
I have had some limited success with Naval jelly. It seems to stop and
remove the rust pretty well. Like you said, it isn't going to look like
new. Whatever damage the rust did will still be there (pitting, bare
steel etc.).
But, it is much cleaner looking after it is cleaned up.
Hi Ron,
I remember reading a tip once on one of these lists about tuning your
transmitter by putting it in spot mode and finding the signal with your
receiver and peaking the pre-selector and the plate using the receiver's
s-meter.
Well, it worked ok for me on the pre-selector, but I could
Hi Guys,
I am looking to buy a clean Drake B-line, or a clean R-4B and I will add
the T-4XB later.
I might be willing to trade a nearly new Flex 3000 for a nice B-line and
some dollars.
Otherwise, I would just like to buy a clean B-line or the pieces thereof
outright for cash.
Thanks for
I've built two AC-4R's with Mike's kits and they worked fine right away.
I got stuck a couple of times, but with a quick check of the schematic
and an application of a bit of common sense I got through it.
It really wasn't that difficult to figure out. He provides a great
product and I haven't
Hi Kevin,
I have an R-4C and a TR-7. The R-4C just has a resistor in the AM slot.
Whereas the TR-7 has an actual 6KHZ filter in it's AM slot.
I have to admit the AM does sound better with the filter (less noise,
all signal).
There is a company named INRAD (nice folks) that will sell you a
Hi Curt,
I was thinking of buying one of those at one time. While collecting
info, I found that one of the R390A gurus had made a couple of videos
about the dissassembly, care and feeding of the beasts. These were like
8 or 12 hours of video so probably very detailed. They are for sale
Hi Guys,
I was up checking out activity on 17 meters today. There wasn't much.
Surprise surprise, but it reminded me of a problem my T-4XC has. I have
been ignoring this issue for
a while now because the bands have been so dead. I tuned up the
transmitter so I could call CQ on 17 meters today
Hi Guys,
I have a T-4XC that I thought I repaired. I replaced the crystal on the
carrier oscillator board. I was then able to bring the oscillator on
frequency with C-6. I put the transmitter through some testing before I
put the covers back on and I noticed that the carrier oscillator changes
Hi Guys,
I have a T-4XC that has a carrier oscillator that C6 won't bring on
frequency. Looks like I need a new crystal, eh?
It looks like C6 is swinging the freq about 200hz but it is from 5644.55
to5644.33 or about 600hz low.
When I turn on my transmitter it changes the R-4C freq
Hi Guys,
About a month ago I was in a CW QSO using my C-line twins. While
transmitting I was getting a little long winded, nothing outrageous, my
transmission lasted
maybe 1.5 minutes at the most when a quite visible puff of smoke arose
from the T-4XC and the panel lights went out. Every
Service Supplement CDs
www.k4oah.com
Robert Fish wrote:
Hi Guys,
About a month ago I was in a CW QSO using my C-line twins. While
transmitting I was getting a little long winded, nothing outrageous,
my transmission lasted
maybe 1.5 minutes at the most when a quite visible puff of smoke
arose from
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