Item: Tung Sol 6C4. Description: Clean and tested. Nice paint, clean pins and a factory box. Testing: Tested using our Triplett 3413B tester. 80%. A test data sheet is included. Quantity: 1. Shipping: Ships for $5.99 flat rate. USPS Ground Advantage. 60-day guarantee. Thank you for your interest.

Vintage Vacuum Tube Sonotone USN COZ 6C4WA Description: The Sonotone 6C4WA is a seven-pin miniature with clear glass and a chrome top. It has a silver plate and a square getter. Nice paint and clean pins. Test Results: The 6C4WA was tested on our Triplett 3413B tester.Test reads: 80%.Testing Shows no shorts or grid emissions. Comment: A clean Sonotone 6C4WA. Military Specification, Used in vintage radios, car radios and amp-mixers. Visit Our Store@https://www.ebay.com/str/jnsvintageradioandtubes 60-day free return. JNS Vintage Radios and Tubes will gladly combine shipping to save you money! Proud Members of the California Historical Radio Society______________________________________________________________________________________________General Info: Please read the listing in its entirety to understand what you are purchasing.If any information is unclear its better to ask questions now than to have a return. JNS Vintage Radios and Tubes aims to be as accurate as possible when describing and testing radios and tubes. However, we are not experts in all Antique/Vintage Radios, Electronic Equipment and Vacuum Tubes. If you see an error please contact us thru the eBay messaging system so we may correct the listing. Our vacuum tubes are inspected and tested on our newly rebuilt/calibrated Hickok 539B tester. The 539B is one of the best Hickok Testers. Each tube is cleaned and allowed to warm-up for 90 seconds prior to actual testing. Tubes are tested for quality, life, grid emissions and shorts. No tube is offered for sale that tests below the min number given. We also use our Triplett 3413B as a backup tester.Please note that all tube testers are not created equal and your tester may show a higher or lower test result than our test equipment.All tubes are wrapped in bubble wrap, packed with peanuts and shipped in a sturdy cardboard box to protect it during transit. All antique and vintage radios are cleaned and tested when possible. Well provide an accurate description of the condition within the listing based on our findings. If you find an error or omission please send us a message thru eBays message system. We now offer restored/repaired chassis by Mikes Radio Restorations here in the Sierra. Mike has over 45 years as a electronics technician in the communications industry and has provided quality radio restorations for many years. Radios are wrapped in bubble wrap and packed with peanuts and when necessary squares of Styrofoam used to protect glass dials, knobs and switches. A word on shipping:JNS Vintage Radios and Tubes uses the United States Postal Service for the majority of our shipments both in the US and Internationally. We employ the eBay shipping calculator to estimate shipping costs. We do not charge a handling fee unless the item is heavy and requires additional attention such as double boxing or needing a shipping crate built.The majority of our shipments use First Class Mail for vacuum tubes and Priority Mail for larger items which provides tracking and insurance. We also use Fed Ex as needed to help save you money. Please contact us should you desire another shipping service. While the eBay shipping calculator is usually accurate, but not always, It is our policy to refund any excess shipping after the item has shipped. Need a firm shipping quote? Contact us. All taxes and duties for International shipments are the responsibilities of the buyer. Please contact your local Customs or Import Authorities. A word regarding returns:If you receive your item and it is damaged. Please contact us first. We want you to be satisfied with your purchase and we work diligently to ensure concerns are resolved fairly, promptly and to your satisfaction. Communication is the key to a successful return. We are proud of our feedback profile maintaining a 100% satisfaction rate since 2014.Returns will be excepted on all tubes and radios unless otherwise specified in the listing description.Returns must be in the original packaging and must have a tracking number assigned. Delivery signature is not required. If the item has been damaged through shipping, please contact us first on how to proceed. This crucial step protects both the buyer and seller and ensures that claims get approved fast and quickly paid. There are no returns authorized on Untested Parts or Parts or Repair items. These items are purchased AS IS and will be stated in the listing description. JNS Vintage Radios and Tubes thanks you for visiting our store and allowing us to provide you quality tubes and vintage radios. Track Page Views WithAuctivas Counter

You are bidding for the following mil spec tubes:2 of - Mullard (KB/D) CV4058 (equivalent to 6C4WA, CV133, M8080, EC90) tubes, box plate, NOS in original mil package.Tubes were tested using an AVO Mk IV. AVO “new tube” values is 10.5mA and 2.2mA/V. Tubes test as follows (matched):Tube 1: 11mA - 2.7mA/VTube 2: 11mA - 2.7mA/VPlease note listed results are as per AVO reading, tube tester was last calibrated more than 10 years ago.For more information and cosmetic condition refer photos. Unpacked weight under 0.25kgs. Please look at my other items; I will combine postage.

For sale is a pair of Mullard 6C4 CV4058 tubes. Box gray plates, NOS in original military boxes.Tubes test as follows: 10.5mA - 2.6mA/V; 11.5mA - 2.6mA/V (Spec=10.5mA and 2.2mA/V) Tested with AVO Mk IV