I have a tube Zenith B&W portable, chassis number partly missing, but it starts with "147----" Series string. 3ha5 6ea8 tuner three 4bz6's if 11af9 video amp sound limiter 4hs8 sync agc 12al11 sound det amp 13fm7 vertical osc/out 6gh8a horiz osc 17jn6 horiz out 22bw3 damper 17eqp4 crt. All I really need is the vertical osc and output ckts. Or at the very least, what's inside those three legged discs marked "87 (dot)". I think that they are more than a pair of caps to ground. TIA