Then later Godman Field denied there was a recording ever made.  It took months, Major Duesler who was supposed to gotten the tape transcribed was himself transferred out.

But there is another "trick" possibly involved here.  There was something called a Plan 62 Interphone System linking several CAA (and presumably AACS) control towers in the region.  One guy at Lockbourne (if I recall which base correctly) actually listened in on Godman's Tower conversation and wrote down the Godman base theodolite trackings of azimuth and elevation for an unidentified object later that evening, which he heard over this interphone system hundreds of miles away from Godman.  Without his record we wouldn't have most of those readings from Godman itself.

Thus it is possible ANOTHER BASE recorded the Godman Tower communications rather than Godman itself.  Later Godman could weasel-wordedly say that they at Godman didn't record anything.

Update

Date: Fri, 30 Jun 2006 00:53:19 -0400 (EDT)
From: Brad Sparks

Duesler has his own personal witness statement already in the BB files. He was supposed to get the tape or a transcript, that was the "investigation." Nothing about any additional report.  Notice Project Sign wasn't giving this a priority as they didn't bother checking on this for 3 months, till April 1948.  Notice Sign didn't ask for Duesler's current duty assignment so they <>could ask him questions.  Notice that Sign didn't get around to investigating Venus and the theodolite readings until a second case from Godman, in Aug 1948, came up, which no one described as a flying saucer.  Even then it took almost 2 months to get to it, but at least they re-opened the Mantell case at that time. 

The fact Project Sign wasn't giving the Mantell case any real priority, that they were slackoff about it, is a bad sign.  Can't make it to be some coverup of ET, and it must not have figured into the Estimate of the Situation of Aug 5, 1948.  Apparently Sign had written off Mantell as Venus from Jan to Nov 1948 when the second (IFO) case from Godman prompted the Mantell incident to be reopened.  That excludes it from the EOTS which was revised in Sept 1948 and finished off in Oct 1948.