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RV-75 from Hamvention


 

Hey guys,

Picked up a nice looking Drake RV-75 vfo for my TR-7 last weekend. Hooked it up last night and my main vfo was in the middle of the 20m band, but when I switched on the remote vfo freq drop to around 13.9mhz and I am not able to adjust it. I guess I got a hamfest special. Any hints on what to look for? I have not even opened it up. Got a great deal on it however so I hope I can fix it. I showed it to Evan, K9SQG when I ran into him there.?

Thanks in advance,?
Eric?
K8cca?


 

Success! A few new caps and cleaning the grounds seems to have fixed it. Very stable! I only did the caps on the top board as I didn't have the 10 & 100uf for the bottom board. I will pick some up tomorrow and this should be back online. Thanks Evan for your thoughts on this thing!

73,?
Eric?
K8cca?



On Tue, May 20, 2025, 3:56?PM K8CCA via <echapm4=[email protected]> wrote:
Hey guys,

Picked up a nice looking Drake RV-75 vfo for my TR-7 last weekend. Hooked it up last night and my main vfo was in the middle of the 20m band, but when I switched on the remote vfo freq drop to around 13.9mhz and I am not able to adjust it. I guess I got a hamfest special. Any hints on what to look for? I have not even opened it up. Got a great deal on it however so I hope I can fix it. I showed it to Evan, K9SQG when I ran into him there.?

Thanks in advance,?
Eric?
K8cca?


 

Congratulations!!!!!!!!!

On Tuesday, May 20, 2025 at 09:03:25 PM EDT, K8CCA via groups.io <echapm4@...> wrote:


Success! A few new caps and cleaning the grounds seems to have fixed it. Very stable! I only did the caps on the top board as I didn't have the 10 & 100uf for the bottom board. I will pick some up tomorrow and this should be back online. Thanks Evan for your thoughts on this thing!

73,?
Eric?
K8cca?



On Tue, May 20, 2025, 3:56?PM K8CCA via <echapm4=[email protected]> wrote:
Hey guys,

Picked up a nice looking Drake RV-75 vfo for my TR-7 last weekend. Hooked it up last night and my main vfo was in the middle of the 20m band, but when I switched on the remote vfo freq drop to around 13.9mhz and I am not able to adjust it. I guess I got a hamfest special. Any hints on what to look for? I have not even opened it up. Got a great deal on it however so I hope I can fix it. I showed it to Evan, K9SQG when I ran into him there.?

Thanks in advance,?
Eric?
K8cca?


 

Any caps that are branded CAPAR should be unconditionally replaced. The larger caps with more recognizable names should be OK.

On Tue, 20 May 2025 21:03:07 -0400
"K8CCA via groups.io" <echapm4@...> wrote:

Success! A few new caps and cleaning the grounds seems to have fixed it.
Very stable! I only did the caps on the top board as I didn't have the 10 &
100uf for the bottom board. I will pick some up tomorrow and this should be
back online. Thanks Evan for your thoughts on this thing!

73,
Eric
K8cca



On Tue, May 20, 2025, 3:56?PM K8CCA via groups.io <echapm4=
[email protected]> wrote:

Hey guys,

Picked up a nice looking Drake RV-75 vfo for my TR-7 last weekend. Hooked
it up last night and my main vfo was in the middle of the 20m band, but
when I switched on the remote vfo freq drop to around 13.9mhz and I am not
able to adjust it. I guess I got a hamfest special. Any hints on what to
look for? I have not even opened it up. Got a great deal on it however so I
hope I can fix it. I showed it to Evan, K9SQG when I ran into him there.

Thanks in advance,
Eric
K8cca






--

73

-Jim
NU0C