I went to the photo page. The schematic is what you are calling to be the sensor I take it. Most everything is straight forward except for the toroidal inductor. drawings and photos are not readable enough for me to figure out exactly.
The big problem is with the toroidal core. Material and dimension matters!! You may not be able to acquire the core. Did it call for Ferroxcube core? If it is, the company is still around and doing quite well. Can't make the part number or its construction on page 3. Yo may not be able to order directly but you should be able to find it at digikey.con or mouser.com Also check with your ham group/forum.
The circuit is simple enough that you could get a perforated prototype board with pads (
http://www.digikey.com/product-detail/en/8029/V2025-ND/1886431). Then mount the component, solder the components, and do a point to point solder connection.
Two other parts which are going to be a problem are the two feedthru caps at the bottom. The trimmer capacitor shouldn't be too hard to obtain. The trimming capacitor on the upper left hand side is probably a mica based. Again ask around on your Ham group/forum on where to get such a thing. Modern electronics have moved away from using such a thing. New designs use active filters, more precise, stable and easier to tune.
You definitely don't need a PCB made for this. The frequency also doesn't require to have a controlled impedance, so no worries there on how you wire the thing up (umm as long as you don't loop your hookup wires)
Go to Ferroxcube and see if they still have the core. If they have it, just follow the instruction on the inductor note, build it exactly, then wire it up according to the schematic on the first page.
Once you build it, you will need to tune it (adjust the trimming caps), and calibrate it.
The circuit is fairly standard, so you might be able to find similar thing in ARRL handbook. It's got tone of good stuff.
sincerely,
--- In Homebrew_PCBs@yahoogroups.com, Peter Johansson <rockets4kids@...> wrote:
>
> On Mon, Nov 19, 2012 at 7:07 PM, herpsrwe <herpsrwe@...> wrote:
>
>
> > As stated in a previous post, I placed a photo I gathered on the internet,
> > a Schematic, the required Inductor, and a Page from the Manual in the
> > PHOTOS Section titled Tram / Diamond Corp ASM-1 SWR / RF Meter.
>
>
> Is there something special about this piece of equipment? Do you have a
> particular need for vintage equipment?
>
> You could probably purchase a new meter for less than it would cost to get
> this one working and calibrated.
>
> -p.
>
>
> [Non-text portions of this message have been removed]
>