Perrier, I really appreciate your level of detail as I am about to undertake the same mods you discussed. Your experience tells me what to expect as I have not yet popped the case. It also motivated me to go hunt out my unibits.
Let me know how it goes and I will do the same. Bill On Thu, Nov 4, 2010 at 6:06 PM, Perry Sandeen <[email protected]> wrote: > > > Gents, > > Wrote:< Yikes, WECO is hard to find. Anyone know a source for WECO > 439A/440A connectors and adapters? Optimist that I am, I thought they would > be easy to find. Coping with an HP 3336B. > > Wrote: <WECO connectors aren't hard to find > > Well, neither are gold nuggets if you want to pay the price. Milstock > connectors are almost $14 each. > > WECO connectors are hard to find for the average person and HP used two > different sizes of WECO connectors on the same input connectors on different > batches of the HP 3586B. The problem still remains that you have to use two > hands when connecting or disconnecting a BNC cable as the adapter rotates. > Yuck! I have some WECO connectors and adapters and find them a PITA to > use. > > I have a 3336B that I’m changing over also. On the C model they used BNC > connectors so there is probably a relatively simple way to do a change over. > Since the output of the attenuator is a BNC male going to a WECO I plan on > trying a female-female bulkhead mount unit from Mouser for $3. > > The other possibility is to try using a female-female barrel connector ($2) > attached to the attenuator. I have a barrel connector but haven’t had the > time to try it yet. Both connectors are 1.3 inches in length. > > The big problem with WECO connectors is their length. > > Changing them out on my HP 3586B SLV became a bit of a challenge. What I > did after dis-assembly was to remove the original WECO connector. (The > module is six inches square and is easy to work on.) > > Using a Uni-bit I enlarged to original WECO hole to accommodate the back of > the flat mounting plate BNC bulkhead adapter I had. This is where it got a > bit tricky. The female bulkhead BNC connector I have are of slightly > different lengths. The longer one measured about 5/8 inches from the base > to the end. One has to mount it on the inside of the module do to the > thinness of the plastic bezel. So after mounting the BNC I had to use a > Dremmel tool with a cutter head to remove plastic so the mounting screws > would fit and allow the bezel to fit flush. > > Even after that was done I had to enlarge the bezel hole with the Uni-bit > so that the BNC male outer shell could lock on properly. > > So far I have done two SLV’s and it has worked fine. In the future though > I’m going to try using female-female straight adapter as they give a quite a > longer connection barrel than the bulkhead units. I have three more SLV’s > to convert. > > I’ve gone into a lot of detail about what I did. Don’t let that discourage > you. It isn’t hard at all. It just takes some time and patience. > > One last thought. If on the HP 3336B you change the 1K single turn > frequency calibration pot to a 10 to 20 turn pot, the oscillator is much > easier to calibrate right on the money > > Regards, > > Perrier > > > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
