[Heathkit] HW-101 weak receive

[g]

My HW-101 receive has dropped a few s-units all of the sudden, without a signal in the noise the s-meter is pinned at s-0, I still hear all signals but the hot receiver it used to be its not any longer, Have replaced  V3 and V4 without any results.
Any ideas where I should be looking for a problem?

Thanks in advance....Gil n2wjw


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