This is a completely assembled & tested set of test probes that fits: 

Heathkit IM-11, IM-13, IM-18, IM-28, IM-5218, IM-5228

 Vacuum Tube Volt Meters

As well as Heathkit IM-16 & IM-25 Solid State VTVMs

These also fit many meters that are private branded versions of these Heathkit designs 

This is hand crafted by me from my popular Deluxe VTVM probe kit sold here on eBay 

Using methods developed by me with excellent attention to detail

The unit is presented in a Labeled, Retail Quality, Reusable, 4 Mil Poly Ziplock Bag and is wrapped with a Reusable Velcro Strip to keep the leads organized and ready for use.

This dual probe setup,  serves as a substitute for the mostly missing or incomplete original test probe which used a switch at the tip of the probe to switch the Resistor in/out of the circuit.

This Siamese or Dual-Probe arrangement involves using one probe for DC Measurement (with the resistor installed) and the other probe for AC/Ohms Measurement.

While the idea of the "Siamese Probe" has been around for years 

- I personally developed the printed laminate label and heat shrink tubing technique seen on these probes (copied by others) 

- I personally created the hot glue injection strain relief technique as well as tools and fixtures to implement it, which results in the most durable and long lasting probes available for these meters today! (this process is not currently duplicated in probes made elsewhere)

The probes are built from the same components used in my kits which is composed of the following items (many of which are hard to source economically):

1 Pair of Test Probes - 1 Red/1 Black - Genuine Philmore Probes (not Chinese probes)

1 1/4" Mono Phone Plug w/Metal Housing and Clear Heat Shrink Sleeve

1 1Meg Ohm 1 Watt Resistor

1 Alligator Clip & Heat Shrink Tubing

2 Laminated Self Adhesive Probe Labels and Clear Heat Shrink Tubing to cover the probe labels, resulting in a professional and durable setup (see photos)

2 36" lengths of RG174 Coaxial Wire (used for DC & AC/Ohms test Leads) (Very Flexible - makes a great test lead) 

1 36" Length of 18 Gauge Rubber Test Lead Wire (Very Flexible - High Quality) for the Ground Lead

The original instructions specify shielded cable for the leads, the original supplied wire was a coaxial microphone style wire, many people use either standard (unshielded) test probe wire for the leads or a shielded coaxial cable, I use shielded black RG174 for the 2 leads and Black test probe wire for the ground.

I Use these probes on my Heathkit IM-11,IM-18 and IM-28 meters with excellent results, and these meters are indespensible for working on Vintage Radio Gear (And I prefer them to my more modern FET meters for this type of work)

   I have shipped these probes and kits to several dozen countries and have received nothing but praise for bott the kits and probes, I think you too will be pleased with this simple and durable set to get that old meter back in service! 

 I build and sell many probe and test lead sets click the link for current listings available in my Store: