HW 101 good late vintage clean and works great...except.......

[W5EUQ]

For the record and archives: 
Suggestions from several......    William Strong, usncb140 at en-tel.net; 
Ed, ma.locksmith at juno.com; Fred, wittfa19 at earthlink.net; Ken, 
kgordon2006 at verizon.net; and Chuck, wcmoore at verizon.net.  I may have 
missed one.... sorry. 

All had good suggestions:  THANK YOU ALL for your help. 

 I'm wrapping it all up in this answer:

I have more than one supply and it's the same on two of them.  Checked 
bias voltages and for AC ripple on DC... no problem here.
800 volts on transmit: is 790 VDC on receive and 739VDC on transmit with 
32 Watts out.
Low voltage is 240VDC on receive and 222VDC on transmit with 32 watts out. 
Bias is -41VDC on receive and same on transmit... Plate current is 30 
Ma.  Increased to 40 Ma and watts out went to 37 watts out.
Changed neutralizing cap  a little at a time to see if it effected 
output and saw  no real effect. 
Drive to final tubes is 51 volts P-P. 
Using 6146A's in final and good 6CL6 and good 6CB6. 
Put spectrum analyzer on it and second harmonic is down by over 60 dB.  
Other's very low and no spurs or parasitics.  Looks clean.

SO... I'm back to what Ken Gordon suggested.... go back through 
alignment again, and again, just to make sure. 

History:  I bought this radio because it looked clean and was a later 
model HW101.  *_Someone had gotten the band switch out of sync_*.  I 
mean some wafers were 180 degrees out from where they were supposed to 
be.  When I corrected this, it started receiving pretty good.  However, 
someone had tweeked the coils way out because of switch out of sync.  I 
went through alignment and tweeked it up on ALL bands.  Then it worked 
even better on receive.  (ALL BANDS)

I went through tubes and replaced some after I tweeked it up good, then 
went back through it again and tweeked it good.  On transmit, I checked 
the peaks of coils and they looked good.  Then went back to receive and 
checked peaks and they were fine.   (ALL BANDS)
I went through the "Harmonic Crystal" settings "per book" and it set up 
pretty good.  (ALL BANDS)
I did NOT neutralize it... my bad. 
Back to the power.  I am going to go slowly through the COMPLETE 
ALIGNMENT PER THE BOOK.  Including neutralizing and we will see what 
happens.  I'll report my results. 

Bob  W5EUQ  Tampa






ma.locksmith at juno.com wrote:
> Well, were you always using the same power supply?
>
> Might the one you are using with this set have an 800 volt output that
> droops on transmit?
>
> Does it have the low B+ set for 300?  Or 250?
>
> Ed
> K1ZOK
>
>
> On Tue, 23 Jan 2007 22:17:43 -0500 W5EUQ <w5euq at VERIZON.NET> writes:
>   
>> Have one that works great.  However, it only gets abut 50Watts 
>> out...even though I have changed tubes... not only 6146's but 6CL6's 
>> and 
>> 6CB6's....   The tubes I have, I have checked in other HW's and they 
>>
>> produced 110watts or 100 watts output... BUT in this one they 
>> don't...   
>> I've checked the 2.2 Ohm cathode resistor, the screen resistor and 
>> voltage.  The RF choke is red and not burned or brown.  I've tried 
>> loading into a dummy load and an antenna of known quality...
>>
>> Any suggestions?  this one is eating my lunch and I need to get on 
>> to 
>> other radios...  am I missing something obvious? 
>> thanks, Bob
>>
>>     
>
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