Hi

For multiple TBolts, the simple answer is local regulation. LT1764’s work fine for the +12 and +5 side. A well bypassed 79L12 can
do the trick for the -12. Feed them all of of a  bulk +15 (high current) llinear supply and a -15 with the lowest output you can find.

The gotcha is that if you have a power outage … all of them fire up at once. The OCXO’s go to max and that condition likely will
do nasty things to a supply not rated to handle the current. A current limit supply will likely eventually recover. A holdback supply
may not ever come back. A supply with defective overload protection may burst into flames ….

Lots of fun.

Bob

James wrote:

I do not anticipate that multiple Tbolts would interact in a negative
manner if they were connected to a good linear supply capable of driving
them all.  Of course, there is always a possibility that I'm wrong and
they would interact.  Only trying it will answer that question.

Note that, as Bob pointed out, the +12v supply will need to source
700-800mA per Tbolt for a few minutes if they are all powered up at
once from cold.  Even if you wouldn't do this in a manual startup, it
would happen when the power came back on if you had a power failure
(unless you devised some automatic means to prevent it).

Best regards,

Charles

Hi

The gotcha is that an OCXO acts as a negative resistance load (current goes up as voltage goes down).
That makes wiring up multiple units problematic. It is not impossible to do, but you can get in trouble. Putting
regulation at each device eliminates the problem. It may be overkill, but the interaction can be tough to spot so
it is generally a good idea.

Bob

Jim,

I use a HP 6236B triple power supply to drive 2 each T'Bolts. Works fine
after the T'Bolts warm up, with limitations on a cold start up.

But once they warm up all is OK.

Using a common outside puck antenna and a HP RF distribution block I can
run 3 T'Bolts and get essentially the same results.

#1 T'Bolt is on a HP 6235A DC PS and #2 and #3 are on the 6236B. #1 has
been on for years.

I am planning to box up and use a  Mean Well SMPS common power supply
that will handle the load current of 3 T'Bolts starting cold.

Adding a few digital panel meters to measure individual load currents
and voltages.

Stan, W1LE  Cape Cod

On 9/1/2016 9:44 AM, James Robbins wrote: