I don't want to pick nits here but the statement that all filters
will fail, and it "could be now" is just not setting the
expectations properly.? I agree that some filters do fail over
time for a variety of reasons, but my experience is that most
filters will live longer than the gear remains operational
otherwise.? And when gear breaks, from a "things that will likely
die first in old gear" - a crystal filter is not remotely near the
top of that list by a long shot.??
Casual readers on the reflector may get the impression from this
claim that filter failures occur more than it does simply because
this reflector has a much higher concentration of guys doing
restoration work.? That does not comprehend the far greater number
of guys with a Drake (or other older radio) sitting on their desk
that has given great service over the years and continues to work
today.?
Maybe some of the old hands at Drake gear may have a specific
exception to this.? Here I'm reminded of the Yaesu bias applied to
the old Murata filters which did lead to many of them dying over
time - not a filter fault per se, but rather a failure by Yaesu to
DC isolate the filter, as an example.
73/jeff/ac0c
alpha-charlie-zero-charlie
On 12/23/2024 7:55 AM, Steve Wedge,
W1ES/4 via groups.io wrote:
toggle quoted message
Show quoted text
I
don't need one at the moment but I'd be willing to get a new 600
Hz filter for my TR-4cW RIT.? I actually had one in another rig
fail and I was fortunate enough to be able to take it apart and
fix it using the baking method but these do fail? Are there any
other TR-4cW owners who would be willing to do this?
73,
Steve Wedge, W1ES
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Monday, December 23rd, 2024 at
8:17 AM, Joseph K7CBR via groups.io
<k7cbr@...> wrote:
Hello,
He can make almost any
filter, however there needs to be enough demand to allow
him to acquire materials and put some profit margin into
the task!
For one two or three
units? It wont happen. It is important for everyone to
recognize that at some point, crystal filters are going to
fail. Could be now, or years from now. Many times small
changes can be compensated for in the alignment process,
yet there is a limit. I have had a couple failed filters
in my Drake equipment over the years. For filters
available through Noble Radio? They are decent! I can't
say enough good about them. Consider that there is nowhere
else to go if you need one. Installing a "used" filter
puts you right back where you started in the quartz
oscillator/capacitor aging process.
If enough people need
filters, lets sign up, get some quantity demand going,
perhaps commit with a 50% deposit, and see if Frank can
make something. I would be willing, as I know where this
is heading in the next few years.
Thanks,
Joseph
On Saturday, December 21, 2024 at 09:10:11 PM EST,
Bob Loving
<bob.loving@...> wrote:
Makes me wonder if Frank could
produce a new 48.050-MHz filter for the TR7.?
Bob K9JU
On Saturday, December 21, 2024 at 07:54:23
PM EST, Floyd - K8AC via groups.io
<floydsense@...> wrote:
Frank made up a 1500 Hz filter for me
and just received it today.? Works
perfectly.? I highly recommend Noble
Radio for filters.
?
73, Floyd - K8AC
