My unit has many connections between chassis and circuit grounds, most
of which look intentional. There are connections at the 1 MHz and 100
KHz BNC outputs (the 5 MHz output is transformer coupled). There's also
a connection at an SMC connector from the multiplier to the SRD final
amplifier.
Did download the manual and a good read.
Thanks
On Mon, Apr 30, 2012 at 12:12 AM, Don Latham wrote:
>
> A first-class engineered unit will have a single point where the chassis
> and circuit grounds tie together, Sometimes it's a panel, where the i/o
> connectors are coaxial. I've fixed units wi
A first-class engineered unit will have a single point where the chassis
and circuit grounds tie together, Sometimes it's a panel, where the i/o
connectors are coaxial. I've fixed units with good engineering and
sloppy construction where accidental extra common points have caused
problems.
> The
Hi Don,
On 4/29/2012 6:41 PM, Donald Henderickx wrote:
On 4/29/2012 6:27 PM, Ed Palmer wrote:
Yes, there's a partial copy of the manual online. It's missing a few
schematics, but is otherwise complete.
http://sundry.i2phd.com/ServiceManual_304b.pdf
Ed
The bottom pin is not chassis ground,
On 4/29/2012 6:27 PM, Ed Palmer wrote:
Yes, there's a partial copy of the manual online. It's missing a few
schematics, but is otherwise complete.
http://sundry.i2phd.com/ServiceManual_304b.pdf
Ed
The bottom pin is not chassis ground,on this unit.
The foam looked original before in crumble
Yes, there's a partial copy of the manual online. It's missing a few
schematics, but is otherwise complete.
http://sundry.i2phd.com/ServiceManual_304b.pdf
Ed
On 4/29/2012 5:18 PM, paul swed wrote:
Curious is the manual online?
Would be interesting to look at.
On Sun, Apr 29, 2012 at 6:33 P
Curious is the manual online?
Would be interesting to look at.
On Sun, Apr 29, 2012 at 6:33 PM, Ed Palmer wrote:
> Hi Don,
>
> On 4/29/2012 2:54 PM, Donald Henderickx wrote:
>
>> On 4/29/2012 1:36 PM, Ed Palmer wrote:
>>
>> Thank you Ed,Paul,and Marco for the reply's
>> The foam I was referring
Hi Don,
On 4/29/2012 2:54 PM, Donald Henderickx wrote:
On 4/29/2012 1:36 PM, Ed Palmer wrote:
Thank you Ed,Paul,and Marco for the reply's
The foam I was referring to is or was around ceramic base were the
igniter wire goes . Yes my wire also broke loose however I do not want
to disassemble a
On 4/29/2012 1:36 PM, Ed Palmer wrote:
Thank you Ed,Paul,and Marco for the reply's
The foam I was referring to is or was around ceramic base were the
igniter wire goes . Yes my wire also broke loose however I do not want
to disassemble any more than I have to. I think that just inserting it
b
I have a working GTC 304 too. Mine is marked "Sperry s/n 002" (!!)
but has another GTC s/n inside the cover. Mine also locks in one
hour, time for the xtal oven to reach temperature.
It is installed in my frequency standards rack at work. If Ed needs
any info, let me know. I never dismounted the
Hi Don,
You know that we're going to be swapping many emails, don't you? :-)
On 4/29/2012 11:16 AM, Donald Henderickx wrote:
After following Ed Palmer's thread on 304b restoration,I was inspired
to get my GTC (tracor) 304b ser#279 going. It seems that the failure
of this unit was the break do
Try a bit of the spray foam not actually in the unit.
Since its intended for houses it should be high temp.
Also recall it expands so truly a bit will do.
Can't think of other foam. But I would go to a home depot and look at what
that have for pipes. It may stand up to the heat. Then cut and fit as
After following Ed Palmer's thread on 304b restoration,I was inspired to
get my GTC (tracor) 304b ser#279 going. It seems that the failure of
this unit was the break down of the foam that was wrapped around the
vcxo located inside the control box. The vapors or the moisture the foam
collected
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