The Test Probes used in the production of this item - Genuine Philmore 912J/913J are not available. I have been advised that I am the largest consumer of this item in the world, however,
The probes are backordered until 05/18/2026 after placing a large order with one of the only suppliers, I have not located inventory of any size in any stocking distributor and Philmore has been unable to give me a lead on a supply, for the moment I have been able to secure a supply of the Chinese copies which are inferior but were used by me extensively in the past

Simpson 311 Series assembled AC/DC/Ohms test probe set

The Simpson 311 series probe is very specific requiring a unique lead configuration

Note: this meter came in several versions and can have 1 of 2 different probe connectors

The original 311 uses the Large Connector

The larger connector is 5/8" in diameter and is a Switchcraft 2501

• The 311-3 uses the Small Connector - This Connector is no longer available! (my supply is exhausted)

The smaller connector is a 7/16" connector and is a "Rare" semi custom connector (this is the connector in the photo of the assembled test lead)

I can supply this probe with a BNC if you wish to convert the meter to BNC

This meter uses 2 seperate Probes, which are connected to one Microphone connector and a separate Ground Lead:

DC Probe - RG174 Coax Cable to a Black Test Probe with Custom 7 Meg ohm Resistor network. 

AC/Ohms Probe - RG174 Coax Cable to a Red Test Probe  (Labeled "AC/Ohms")

Ground Wire  - Black Banana Plug - Black Test Lead Wire to Alligator Clip

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.

This is hand assembled of the following components:

1 Pair of Genuine Philmore Test Lead Probes - 1 Red/1 Black

1 Microphone Connector Either Switchcraft or BNC

7 Meg Ohms of Resistance

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" length of RG174 Coaxial Wire for DC Lead (Very Flexible - makes a great test lead) 

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

I have shipped these probes and kits to several dozen countries and have received nothing but praise for bot 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:

https://www.ebay.com/str/kk4hxj/Custom-Test-Leads-Test-Probes-/_i.html?_storecat=27854182016

Feel free to contact me with any questions regarding this or any of my other probe assemblies or kits!

I Ship First Class with tracking to meet eBay Guidelines

Thanks for looking and 73's from Kentcraft, LLC & KK4HXJ eBay Store