[Boatanchors] Drake 2B RX Question

[Garey Barrell]

The coil you're referring to is in the plate circuit of the oscillator 
and is only involved in bands 20M and up where the oscillator is 
operated in overtone mode.  It has no effect on 40M, which is almost 
always a 6U8 that has finally dropped low enough in gain to fail.  A 
6EA8 has slightly higher gain and will often resurrect a 40M crystal, 
but not always.

Your info IS significant for 20M and up, but not on the lower bands 
where the oscillator is operating on the crystal fundamental.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs
<www.k4oah.com>


Gary Schafer wrote:
> It has been awhile since I worked on one but as I remember there is an
> oscillator coil that needs to be tuned to make the crystal oscillator go.
> You want to tune it a little to one side of peak (the broad tuning side) so
> that it will start again the next time.
>
> 73
> Gary  K4FMX
>
>    
>> -----Original Message-----
>> From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
>> bounces at mailman.qth.net] On Behalf Of Lee Buller
>> Sent: Friday, November 13, 2009 10:32 PM
>> To: boatanchors at mailman.qth.net
>> Subject: [Boatanchors] Drake 2B RX Question
>>
>>
>> Hello,
>>
>> I just got a Drake 2B off of EBay and have it fired up on my workbench.
>> First time I am fooling around with a Drake.  The questions I have is that
>> there is no signals on 40 meters.  I get nice signals on 80 meters....both
>> CW and SSB.  40 meters does not even peak up on the pre-selector.  On 20,
>> I do get a peak in noise, but there are not signals up there.  I get no
>> peak on 15 or 10 meters.  Seems to me the Xtal oscillator might not be
>> going or I do not know how to operate the RX.
>>
>> The unit is real stable from the get go.  Been listening to a net on 75
>> meters and there has been no drift at all.
>>
>> The Xtals are a little confusing so any enlightenment one might have would
>> be helpful
>>
>> It does have the standard 3 Xtals in 40 20 and the middle 10 slot.  It
>> does have a Xtal in the "E" slot, but I have not figure out what that one
>> is yet.  Late in the day.
>>
>> Could I have a bum 40 meter Xtal?  If so, where do I get another?  Or, can
>> I unseat it and seat it again?  Clean the contacts of the band switch?
>>
>> Lee
>>      
>