On a related note does any one know the likely serial number ranges of the HP5065's that would benefit from this treatment ?   (Or is there any other easy way to tell the units appart ?)   Thanks to all concerned for the effort put forwards on this project.    It may sway me towards actually buying an HP5065 at some point in the future.   The efforts are appreciated.   Regards Mark S Message: 5 Date: Wed, 01 May 2013 11:58:58 -0600 From: Ed Palmer <ed_palmer@sasktel.net> To: time-nuts@febo.com Subject: Re: [time-nuts] hp5065b !!! Message-ID: <518157E2.2020008@sasktel.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Another factor that limits the (apparent) interest is that the 5065B is one of the most expensive and hardest to find Rb standards around.  Even on the used market the price for a 5065B in good condition can be breathtaking.  If Corby's work can be extended to other, more common units, the level of interest will explode.  The question, of course, is whether the more common units will see any improvement.  Since not all 5065B units show the same improvement, I won't be holding my breath!  :-) Ed On 5/1/2013 9:13 AM, Magnus Danielson wrote: > On 05/01/2013 03:26 PM, EWKehren@aol.com wrote: >> The multiplier and output has been changed significantly. We can not >> put a >> finger on one part but if you reed the paper  . >> http://tf.boulder.nist.gov/general/pdf/1219.pdf     that Bruce posted >> it does explain the RF >> significance.I ignored the laser part  since I will not be able to >> duplicate, but the >> microwave part clearly outlines  its contribution to performance. >> Right now >> we are doing it off list since there  seems not to be much interest in >> having H Maser like performance at  home. > > There is at least from me, and I know others reads with interest. > Remember that many remains silent on the list even if they read it > with interest, so number of replies does not reflect interest. > > Cheers, > Magnus >