VTVM RF Probe - Low Voltage - Heathkit IM and V Series Meters V-7/IM-18 Etc

Description

- KK4HXJ -
Low Voltage VTVM RF Probe - for Heathkit IM and V Series Meters
This includes the IM-11, IM-13, IM-18, IM-28, IM-5218, IM-5228
V-4, V-5, V-6, V-7 and V-7A Models
and many other VTVMs which are rebranded Heathkit models which use a single 1/4" phone style probe connection
This is a "Classic" Low Voltage RF Probe, based upon the designs from the pages of Magazines and ARRL Publications from the 60's
For an excellent explanation of the workings, uses, expectations and
limitations
of this type of probe eBay does not permit me to include a link so do a web search for n5ese rfprobe  (used with express written permission of the author)
I call this a
low voltage probe
- since due to the limitations of space and available components - the input capacitor is rated at 50 Volts and the AC/RF Measurements are limited to 35 Volts based upon the Diode used
(this is the normal range for this type of probe)
It is also important to note, the main uses for this type of probe is for tracing of signals through a circuit and the actual voltage measurements are not generally as important as the relative measurements - I have attached several images showing the signal generator output and the resulting readings on my Heathkit IM-28 Benchtop Meter
the readings show accuracy of +/-20% accross the range of 1K-30Mhz frequency ranges
These probes are built with 4.7Meg Ohm resistor and are suitable for Meters with input Impedance/Resistance of 10-11 Meg Ohms
The probe is available in 2 versions:
1 for Heathkit VTVM's using 1/4" Mono Phone Plug Connectors including all V-Series and IM Series meters
And another version for Many meters using the Switchcraft 2501 Style Microphone Connector
Including:
B&K 175/177
Paco V-70
RCA Voltohmist WV-98(a/b/c) / WV-87A / WV-77C /WV-77A
Eico 222/232/235/249
Knight KG-625 & KG-694
Lafayette KT-174
and
Many Others!
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.
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
U.S. Shipper - Ships immediately
I Combine shipping on all auctions -
Please add all items to shopping cart before checkout
- eBay usually charges the correct shipping - if you order more than 1 item and eBay does not calculate combined shipping correctly, you can either wait for an invoice with the total, or go ahead and pay for all items with ebay calculated shipping and I will refund you any overages, based upon the actual cost of shipping! - In no case will shipping ever exceed .20
Thanks for looking and 73's from Kentcraft, LLC & KK4HXJ eBay Store