This item is sold out at the moment.

Eimac 3-400Z vacuum tube - mint condition - ancestor of 3-500Z

Sold by LeedsRadio
+ $11.00 shipping
+ $11.00 shipping


Item details

This Eimac 3-400Z is in spectacular shape. There is not a mark on it and even the branding is like new. The only thing that makes me think is was used (ever so slightly!) is that it came in with a heat-dissipating plate cap attached, which is included.

The 3-400Z is a triode vacuum tube that requires forced air cooling in operation.

5.25" (13.34 cm) high and 3.6" (9.15 cm) diameter.

The 3-400Z is the ancestor of the famous 3-500Z

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Shipping & policies
Preparation takes 1-2 business days
Arrives from the United States
Estimated Shipping
Shipping to
Zip or postal code

March 2018
Almost all order received before 11 am will be shipped the same day.

Typical transit times:
Priority Mail: 3 business days
First Class Package: 4-5 business days

All items are shipped with tracking. You will receive an email with the tracking number once the item has shipped. Feel free to contact me at any time with questions.

If you need special packing for a gift or special occasion please let us know and we'll see what we can dream up.

I cannot ship under your UPS, DHL, or Fed Ex account.


We accept both PayPal and credit cards through Etsy's Direct Checkout.

You may cancel an order any time before it is shipped for a full refund.

Returns & exchanges
I gladly accept returns, exchanges, and cancellations
Contact me within: 5 days of delivery
Ship items back within: 7 days of delivery
Request a cancellation within: 1 hour of purchase
The following items can't be returned or exchanged
Because of the nature of these items, unless they arrive damaged or defective, I can't accept returns for:
  • Custom or personalized orders
  • Perishable products (like food or flowers)
  • Digital downloads
  • Intimate items (for health/hygiene reasons)
Conditions of return
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.
Questions about your order?
Please contact me if you have any problems with your order.
Additional return information
You can cancel an order any time before it has been shipped.

Preferential returns:
You can return any item that is not marked as "AS-IS" within seven (7) business days of receipt. Item must be in the condition it was shipped. You will receive a refund less the shipping cost to you. You must pay return shipping.

The one exception is digital downloads. There are NO returns on digital downloads.

I accept exchanges. You must pay shipping back to Leeds and shipping of new item to you.

Claims for damage:
Leeds has been shipping with the United States Postal Service for 18 years and shipped thousands and thousands of delicate electronic parts and fragile vacuum tubes. In that time we have had only ONE claim for damage.

In the extremely unlikely event that your item arrived damaged please contact me immediately. Save ALL packing.

If there is a problem please contact me through Etsy's convo system.
I want you to be happy.

I can ship international but please understand that USPS international rates are quite high.

Additional policies

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