Hi. I seen posts and chatter on the subject for years but I'm still a bit confused. My apologies if this topic has already been addressed and I missed it.
I own two sets of original, square, light-tan-colored DB4076 duplexers. The factory tag on both indicates they're "DB4076-B" units, and originally tuned in the 450's- 450.125 TX/455.125 RX. Current 4076 info states "-B" freq range as 470-492 MHz. Its obvious to me however that the current version of the 4076 duplexer is completely different from these older square-cavity tan types. Yet I see the older units everywhere at hamfests, ebay, etc. Does anyone have specs on the original, square, light-tan cavity DB4076? Maybe an old brochure or something? Any help would be greatly appreciated! Dan Saputo K8PLW Livonia, MI
