[Amps] Henry 2K-3 amp restore

[John Simmons]

There may be a pot to calibrate the HV meter. The pot may be dirty or 
need replacement. Or it could be a sticky meter movement.

73,
-John NI0K

> Jim W7RY <mailto:jimw7ry at gmail.com>
> Sunday, November 12, 2017 11:23 PM
> I would look for a ban connection on the meter switch for most of your 
> issues.  Could be bad diodes in the "wattmeter". Never had to replace 
> a diode in one of a Henry. It's probably more like a relative power 
> meter than an accurate wattmeter.
> It's also possible the meter itself has and issue. Check for static on 
> the meter face keeping the needle from moving upward.
>
> Also check for bad HV metering resistors.
>
> As for a dial light, there are quite a few bayonet lamp LED 
> replacements. Get a low color number. The lower the number, the more 
> "soft white" it is, more like an original incandescent pilot lamp.
>
> 73 and let us know how you do.
>
> Jim W7RY
>
>
> -----Original Message----- From: Bob Darlington
> Sent: Sunday, November 12, 2017 10:24 PM
> To: Amps group
> Subject: [Amps] Henry 2K-3 amp restore
>
> Hi all,
>
> After a 3 year wait, I finally have my Henry 2K-3 at home from a 
> seller out
> on the east coast.  I have it up and running and producing lots of 
> power as
> expected.  Amazingly, the ancient 3-500Z tubes are still humming along.
>
> Having only received it yesterday, I haven't had a whole lot of time with
> it yet but I immediately see a couple problems.  Initially the B+ was
> showing just over 3kV but dropped down to about 2200 on the front meter.
> Tapping/banging on the chassis causes this to fluctuate a bit but it 
> won't
> go back up.  My HV probe does show about 3300 at the connections to the
> tubes (no tubes present during initial testing).  Does this sound like 
> old
> resistors in the metering circuit?  I haven't tested them yet, just 
> taking
> a guess and crossing my fingers that it's not a problem with the teardrop
> meter.
>
> The next issue is that the forward and reverse positions on the meter
> switch result in no output to the meter.  I found an SWR bridge schematic
> in another model Henry amp and assume that it's similar in the 2K-3 but
> don't know for sure.  Is this the long rectangular box running on the 
> back
> right by the small compartment with the rear connections?  Any hints on
> where to start troubleshooting this?   I have a pair of Bird meters so 
> this
> is less of a concern but it would be nice to get it working again.
>
> And lastly, one of the two bulbs is out behind the front dials.  Do 
> any of
> you have a replacement part suggestion?  I'd like to use LED bulbs but I
> don't know anything about sizing bayonet base bulbs and would prefer to
> swap a bulb rather than a bulb and socket combo.
>
> And word to the wise, if a friend says he'll be driving the 1800 miles 
> out
> to visit you in the spring, ask him spring of what year *before* you buy
> the boat anchor.
>
> Thank you,
> Bob
> N3XKB
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> Bob Darlington <mailto:rdarlington at gmail.com>
> Sunday, November 12, 2017 10:24 PM
> Hi all,
>
> After a 3 year wait, I finally have my Henry 2K-3 at home from a 
> seller out
> on the east coast. I have it up and running and producing lots of power as
> expected. Amazingly, the ancient 3-500Z tubes are still humming along.
>
> Having only received it yesterday, I haven't had a whole lot of time with
> it yet but I immediately see a couple problems. Initially the B+ was
> showing just over 3kV but dropped down to about 2200 on the front meter.
> Tapping/banging on the chassis causes this to fluctuate a bit but it won't
> go back up. My HV probe does show about 3300 at the connections to the
> tubes (no tubes present during initial testing). Does this sound like old
> resistors in the metering circuit? I haven't tested them yet, just taking
> a guess and crossing my fingers that it's not a problem with the teardrop
> meter.
>
> The next issue is that the forward and reverse positions on the meter
> switch result in no output to the meter. I found an SWR bridge schematic
> in another model Henry amp and assume that it's similar in the 2K-3 but
> don't know for sure. Is this the long rectangular box running on the back
> right by the small compartment with the rear connections? Any hints on
> where to start troubleshooting this? I have a pair of Bird meters so this
> is less of a concern but it would be nice to get it working again.
>
> And lastly, one of the two bulbs is out behind the front dials. Do any of
> you have a replacement part suggestion? I'd like to use LED bulbs but I
> don't know anything about sizing bayonet base bulbs and would prefer to
> swap a bulb rather than a bulb and socket combo.
>
> And word to the wise, if a friend says he'll be driving the 1800 miles out
> to visit you in the spring, ask him spring of what year *before* you buy
> the boat anchor.
>
> Thank you,
> Bob
> N3XKB
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps