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Seller Store robtram
(12468) 100.0%,

Location: Hernando, Florida
Ships to: US,
Item: 276085561359

Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Tung-Sol:Tung-Sol
JTL 5687:JTL 5687

4 TUNG-SOL JTL 5687 TUBES #E31 Click images to enlarge Description         These are a medium mu dual triode. These have the horseshoe getter on top. They are from the mid 50’s. These are great tubes that people are starting to use again in audio amplifiers. Both triode systems have an amplification factor of 17 and a plate resistance of about 3kOhm. This puts one half of the 5687 in the vicinity of a 6SN7 with both sections connected in parallel. It just has a tad less amplification factor. Quite an interesting tube actually. The 5687 enjoyed some popularity among tube amplifier builders 20 years ago but seemed to have been forgotten. It could be very useable in a linestage and also as a driver for power tubes. They tested at 79/82, 86/86, 85/88, and 91/91 with 32 being the minimum allowable on my TV7 tube tester.  We test all our tubes on a calibrated TV-7U or Sencore tube testers. Some large transmitting tubes are tested on custom built testers or actual amplifiers. Some audio output tubes are tested with a match maker and I list the IP (plate) current as well as the mutual conductance.        All my used tubes have been well tested (sometimes twice). I only sell tubes that test strong and have a good life, I will not sell any marginal tubes.        All tubes come with a 30 day money back guarantee that they test good and are use able. We have stamped all our tubes with a logo for identification so make sure you do not wash off the logo during the 30 days. I will not accept tubes back with out the logo. They will also be extremely well packed. If you have any questions or want info on upcoming items I will have for sale, you can contact me at my ABOUT ME page, please click below for link. PLEASE CLICK HERE FOR “ABOUT ME” PAGE   Payment Taxes will be applied if required by your State. Shipping Shipping can be calculated using the shipping calculator. We use the most cost effective and reliable. We can combine shipping on most tubes, and just charge you the actual total cost.Just ask us for combined invoice total. We try to keep the shipping cost down by offering First Class Mail and Parcel Select but please be aware that this can take up to 10 days to arrive, in most cases it doesn’t but if you need it soon please pick shipping for Priority. If you prefer a different shipping method please ask and we will see what we can do. The 1 day domestic handling time is after payment clears. OVERSEAS BUYERS: Please contact us for Shipping/insurance for overseas all Duties and Tariff charges are the buyers responsibility . Since USPS has eliminated surface and parcel post airmail, small items may be combined and put in a flat rate box. We can not declare at a lower amount due to eBay and USPS regulations. contact me for the best shipping price. No shipping charges will be refunded. Terms of Sale All items are guaranteed to be in the condition stated unless sold AS-IS and stated so in the beginning of description. All items must be returned for refund, no exeptions. If you have any questions please email me. About Us Track Page Views WithAuctiva’s Counter

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