Up for sale BRAND NEW GU-74B Russian tetrode tube. Typical output power (HF hamradio). The item "GU-74B NOS 4CX800A Russian NEW Tube GU74B" is in sale since Sunday, February 12, 2017. This item is in the category "Consumer Electronics\Radio Communication\Parts & Accessories\Tubes". The seller is "hfvhfparts" and is located in EUROPE. This item can be shipped worldwide.