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The B&K also can produce IF test pattern output at both common IF frequencies which helps in troubleshooting dead tuner/dead IF stage issues. There is UHF output if you need to check a UHF tuner. It has 4.5Mhz RF audio that you can inject to troubleshoot dead intercarrier audio IF stages. It can ring test flybacks/yokes. In addition to the mentioned H plate drive, it can also provide V plate drive and H grid drive (also V grid drive IIRC).
IMHO no serious TV restorers bench should be without one.
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