Pete W2HP is selling a Heath DX-40 and VF-1 on QTH.com(ad#625952).It is from
the estate of KI2J.Usual disclaimers apply.
Joe
W4AAB
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Our Main Website:
Even with accessories, it seems like he could wait a long time to
sell a DX40 for $300.00
WA0MNA has a Heath station with DX-40 as the transmitter for sale for $300.
shipped.Ad#624294. No receiver, but antenna tuner and VF-1 VFO and other
accessories.He said he needs the bucks. Even a
Does someone have a good method of modifying a DX-40 for PTT?
Thanks,
Rick/K5IZ
Yes, as a matter of fact I have set up a number of these little entry level
rigs with PTT by constructing a little relay box utilizing a 4PDT relay with a
low voltage (6-24VDC) coil. You can then key the relay with your mike switch.
Its OK to utilize some rectified fil voltage for the relay
Thanks Jack. That sounds like a nice universal solution.
Rick/K5IZ
[EMAIL PROTECTED] wrote:
Yes, as a matter of fact I have set up a number of these little entry level
rigs with PTT by constructing a little relay box utilizing a 4PDT relay with a low
voltage (6-24VDC) coil. You can then
I have heard some DX40s and DX60s that sound really great
on AM using a D104 with no modifications. I get good reports
on my DX60 with the D104. These rigs are a bit finnicky on
adjustment of the drive level, drive tune, loading, grid
current etc. If things are not just right, they can act
Thanks Brian. I've noticed that the loading of the DX-40 can be a
little cantankerous at times. I'm going to revisit the D-104 dilemma
again today if I can . I am obviously doing something wrong since so
many people have replied telling me they use a D-104 with great success.
73,
Rick/K5IZ
You have checked out the D104 also? The elements can go bad. Make sure
you aren't using the amplifier in the base which would way overdrive the
audio input of the DX-40
73, Larry K2LT.
Rick Brashear wrote:
Thanks Brian. I've noticed that the loading of the DX-40 can be a
little
Larry,
Thanks for the tips. I'll check the mic.
73,
Rick
Larry Taft wrote:
You have checked out the D104 also? The elements can go bad. Make
sure you aren't using the amplifier in the base which would way
overdrive the audio input of the DX-40
73, Larry K2LT.
Rick,
I also have a Shure 444 and it sounds fine. I may
start fooling around with a higher fidelity mike and a
modulation monitor (from my part time broadcast
engineering business) to see how good the audio can be
with controlled carrier modulation. Hope to hear you
on 40 meter phone.
Ken, KC8QO
Ken,
Don told me of a modification to help control the over drive caused by
the D-104 and I think I'll try it when I have time. The DX-40 should
sound real good once the audio is adjusted properly. Hopefully, we can
compare notes on the air real soon.
73,
Rick/K5IZ
Ken Zuercher wrote:
Rick,
I rebuilt my DX-40 a few years ago and bit the bullet.
I changed the filter caps and unfortunately the power
transformer. It all works fine. I would recommend just
throwing awaw the filter caps as they are likely to be
very old and the hum might be due to them. Good luck,
i'll keep my ear
Thanks Ken. The filter caps had recently been replaced, I checked them
anyway and they tested fine. Replacing a couple of bypass caps seemed
to do the trick. There is a little noise left, but I honestly think
it's just incidental noise not an actual hum.
My buddy is using a D-104 (non
A friend and I are working on his DX-40. It works beautifully with the
exception of a hum (sounds more like 60 than 120 cycles to my ear) on
the carrier when in phone mode whether the mic is connected or not. We
have just begun to look at it, but I thought if someone here has had
experience
Hello, list.
Need a copy of the schematic for the version of the Heathkit DX-40
transmitter that has the 20 uF electrolytic capacitor in the speech
amplifier section. Please contact me off-list if you can help.
The schematic on BAMA isn't the correct one for my transmitter,
unfortunately; the
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