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The 3-500ZG tube is a 3-500Z tube type that has a rugged graphite anode. This 3-500 tube version has an anode dissipation of approximately 600W if additional air flow is provided. Made in China. Warranty Information: 3,300 filament hours pro-rated, 24 months shelf time from date of purchase.
Other Ham radio tubes
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Warranty Information and Return Policy Warranty Period: 3 months
All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)
If you receive a tube that does not perform to the manufacturer's specifications, please do the following:
- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.
Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.
We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.
These guidelines may be updated without notice.
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