Bob and George
I now believe my T-bolt is operating correctly.
Upon power-up the cooled T-bolt draws about 700mA on the +12 supply until
the oscillator warms up. I also misunderstood the temperature sensor and the
temperature displays on the LH software
Thanks for your assistance.
Don O'Connor
Hi
If you leave the unit off power for a couple minutes, does the +12 current
start at something higher than 150 ma? It should be well above 500 ma at
turn on. If not, then the oven in the OCXO isn't doing it's thing.
Bob
You're probably OK. The T'bolt doesn't report oven temp, but rather the
temp near the edge of the pwb some distance from the oscillator. Think of
it as the environmental temp inside the package. If you ever look inside,
look for an 8 pin Dallas Semi IC that is labeled DS1620; it's right behind
the DB-9 connector - that's where the temp is measured.
73,
geo - n4ua
Hello all,
I recently purchased a ThunderBolt on eBay. I believe the T-Bolt's
oscillator oven is not operating correctly. But, having never used a
T-Bolt
or Lady Heather software I'm not sure.
Why I believe there is a problem:
1. The T-Bolt's external case is barely warm (my guess about 100F)
2. The positive 12 volt power supply current remains steady at about
155mA
3. The temperatures displayed on LH software.
Near the top left of the screen in white 22.29C
Underneath in red -16.3C
At bottom of screen above graph 16.2C
Question, is this normal? Do I need to enable the oven or change a
temperature setting?
Thanks in advance.
Don O'Connor
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