In order to avoid confusion it is sometimes necessary to untangle the callsigns which keep re-emerging like mushrooms after a rain:
KSAN: This callsign has been on AM 1450 and TV 32, then was moved to 94.9, then to 107.7. It has an unbroken lineage going back to the 1930s.
KSOL: This sign first appeared on AM 1450, then was dropped. It was then picked up by an unrelated owner for 107.7, and then moved to 98.9 when those stations swapped.
KNEW: Has been on 910 since 1966 and was on TV 32 for a couple years, 1966 to 1968 I believe.
KCBS: This sign has been on AM 740 since the late 1940s. It made its first appearance on 103.7, and after a station swap moved to 98.9 and then on 97.3 when that station was part of a 3-way swap.
KEAR: This sign began on AM 1550, then went to co-owned 97.3. It was swapped in the mid-70s to land on 106.9. It is now on AM 610. This sign also has a direct lineage to its first use.
KRON: This sign in addition to being on TV 4 has also been on 96.5, prior to the switch of the sign to KOIT.
KOIT: Was originally used on 93.3 as KYA's FM station. Was dropped. Later, in an unrelated move Bonneville picked up the callsign and put it on 96.5 and 1260.
KGO: The FM side of KGO 810 was originally on 106.1 then moved to 103.7 after a station swap. It was removed and then put back again, then removed again.
KNBR: The FM side was once on 99.7.
KCSM: The FM station was originally on 90.9 then moved to 91.1 in a 3-way swap. The TV was orignally on 14 then moved to 60 in a 2-way swap. The other side of the TV swap was KDTV.
KBAY: The original KBAY was on 104.5 under its founder Kaiser Broadcasting. Then it was changed to KFOG. The callsign was dropped and then picked up in an unrelated action and applied to the new TV 20 before that callsign was ultimate changed to KEMO. The callsign was again dormant and was picked up once again in an unrelated action and assigned to 100.3 in San Jose (the former KEEN-FM) in the late 1960s (1968?). In a swap, KBAY ended up on 93.3 in SF, and then went to Gilroy where it now resides on 94.5.
KSJO: Orignally the callsign for AM 1590, it was applied to its co-owned FM on 95.3, then after a frequency swap with a bankrupt station landed on 92.3 where it resides today.
KPEN: Originally licensed to Atherton, then to SF on 101.3 for many years, then was dropped. Sign was picked up by an unrelated owner for 97.7 in Los Altos and used there for over a decade.
KFRC: Oh....dear. Originally on AM 610 (a sequentially-issued callsign dating to 1924), the sign was on an application for TV channel 2 in 1949, then dropped when RKO decided not to pursue TV in SF. KFRC has been applied to FMs on 106.1, then 99.7, then 106.9. It also has an unbroken lineage.
There. I think I've covered them all.
KSAN: This callsign has been on AM 1450 and TV 32, then was moved to 94.9, then to 107.7. It has an unbroken lineage going back to the 1930s.
KSOL: This sign first appeared on AM 1450, then was dropped. It was then picked up by an unrelated owner for 107.7, and then moved to 98.9 when those stations swapped.
KNEW: Has been on 910 since 1966 and was on TV 32 for a couple years, 1966 to 1968 I believe.
KCBS: This sign has been on AM 740 since the late 1940s. It made its first appearance on 103.7, and after a station swap moved to 98.9 and then on 97.3 when that station was part of a 3-way swap.
KEAR: This sign began on AM 1550, then went to co-owned 97.3. It was swapped in the mid-70s to land on 106.9. It is now on AM 610. This sign also has a direct lineage to its first use.
KRON: This sign in addition to being on TV 4 has also been on 96.5, prior to the switch of the sign to KOIT.
KOIT: Was originally used on 93.3 as KYA's FM station. Was dropped. Later, in an unrelated move Bonneville picked up the callsign and put it on 96.5 and 1260.
KGO: The FM side of KGO 810 was originally on 106.1 then moved to 103.7 after a station swap. It was removed and then put back again, then removed again.
KNBR: The FM side was once on 99.7.
KCSM: The FM station was originally on 90.9 then moved to 91.1 in a 3-way swap. The TV was orignally on 14 then moved to 60 in a 2-way swap. The other side of the TV swap was KDTV.
KBAY: The original KBAY was on 104.5 under its founder Kaiser Broadcasting. Then it was changed to KFOG. The callsign was dropped and then picked up in an unrelated action and applied to the new TV 20 before that callsign was ultimate changed to KEMO. The callsign was again dormant and was picked up once again in an unrelated action and assigned to 100.3 in San Jose (the former KEEN-FM) in the late 1960s (1968?). In a swap, KBAY ended up on 93.3 in SF, and then went to Gilroy where it now resides on 94.5.
KSJO: Orignally the callsign for AM 1590, it was applied to its co-owned FM on 95.3, then after a frequency swap with a bankrupt station landed on 92.3 where it resides today.
KPEN: Originally licensed to Atherton, then to SF on 101.3 for many years, then was dropped. Sign was picked up by an unrelated owner for 97.7 in Los Altos and used there for over a decade.
KFRC: Oh....dear. Originally on AM 610 (a sequentially-issued callsign dating to 1924), the sign was on an application for TV channel 2 in 1949, then dropped when RKO decided not to pursue TV in SF. KFRC has been applied to FMs on 106.1, then 99.7, then 106.9. It also has an unbroken lineage.
There. I think I've covered them all.