Other JJ Electronics tubes7027 Tube Types
Additional Information and Downloads
Download Adobe Acrobat PDF reader
Warranty Information and Return PolicyWarranty 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.
Ratings & Reviews
If your B+ is over 550 volts buy NOS
These are okay in Ampegs, but I have to use real 7027As in my Evans, Sho Bud and other clean loud amps. A real 7027A should take 650 VDC B+ no problem. 600 VDC is the plate design max for a 7027A. This is more like a 6L6GC than a 7027, and not at all like a 7027A. Anyone who has taken a hammer to JJ tubes will find a few interesting things. The glass envelope is well made. The plates are okay, but the 6L6, 7027, and EL34 all have the same cathode. JJ tubes have a reputation of being quite tough, when you get a good batch. Unfortunately the quality is inconsistent. They drive my to fits of rage a few times a year. At least this seller and another seem to cull out the weird 6L6GCs that draw oddball plate currents. My local supplier was using a Maxi Matcher, with no regard to anything but matching pairs. They make some fine tubes, but this is not one of their better ones. I wish Tung Sol (New Sensor) would do a genuine 660 VDC absolute max 7027A!