You will notice the MA UHF Isolators drift
with heat a lot more than largers current
dual port products.
Instrument tuning is not the best option,
except maybe to get it in the ball park.
They are tuned just like dual port telewave
types. Never trusting one specific method,
I use both the t
Hi Micheal,
The attachments sent to the group don't come
through to those of us reading posts on line
with a web browswer. Would you or anyone who
received the attachment please Email forward
me a copy?
Mucho Thanks
skipp
[EMAIL PROTECTED]
skipp025 at yahoo.com
> Micheal Salem <[EM
> Micheal Salem <[EMAIL PROTECTED]> wrote:
> I could never get it anywhere near the specs.
> So, I called Microwave Associates and spoke
> to someone in their repair department. I
> described what had happened and what I had
> done. He told me that this was very tricky
> to do and that they
> Micheal Salem <[EMAIL PROTECTED]>
> I think that they may be concerned about off
> resonance circulating currents or voltages
> during tuneup which could demagnetize (or
> change the permanent fields of the internal
> magnets and damage the isolator.
Heat...
> I would have to look it up, b
Don't ever throw that catalog out... If it was
worth your time, I'd pay you for some photocopies
or page scans.
thanks
skipp
> Micheal Salem <[EMAIL PROTECTED]> ,wrote:
> Skip:
>
> I did look it up when I got home in my ancient M/A-COM
> catalog (From 1982, no less. It is hard to throw this
What power levels have you seen the drift issue at? I'm not going to run more
than 30W into these units.
On Thursday 05 May 2005 19:22, skipp025 wrote:
> You will notice the MA UHF Isolators drift
> with heat a lot more than largers current
> dual port products.
>
> Instrument tuning is not the
Skipp:
Actually, I have two different versions of the same catalog, one
is in a red plastic custom binder, the other is a metal binder
with cardboard covers.
No need to pay for scans. You have credit because you sent me
some photocopies of various circuits that you had many years ago.
Where would one expect to find the low pass filters to use with this isolator?
If they are hard to find or are expensive, does anyone have a LPF design the
can share which is capable of 50W on 70cm which can be constucted in a die
cast aluminum box?
I have an ridiculously expensive and bulky K&L
Steve:
The low pass filter is a D4066 and I have found them in flea markets and
bought one at Dayton
for not much money, but that was many years ago. I have never opened
one up, but
it is a harmonic low pass filter intended to make up for the distortion
of rf going through
the isolator. I th
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