[Hammarlund] HQ-180 Power Transformer

[Gilbert Guimaraes]

Thanks for all the great info and suggestions.  This is my first boat 
anchor, but I do have experience maintaining and repairing electronics, 
but not a lot of experience with tubes. That said, here is what info I 
have gathered from reading the Op/Service manuals and various web sites.

I have a basic HQ-180 with the optional 24-hour clock-timer installed.  
That according to some web sites makes this an HQ-180C.
The basic 180 has a tube rectifier and the power transformer is a single 
PRI with three SEC windings: 260-0260 Plate voltage, 6.3 VAC filament 
and 5 VAC filament for the rectifier tube.

The 180A has no rectifier tube, it uses dual solid state diode.  The 
power transformer has a dual PRI, connected in parallel and a dual 
secondary: ?? Plate voltage and 6.3 VAC filament.  It has an additional 
transformer, T22 that provides filament voltage for the HF osc and mixer 
tubes any time the set is plugged in, this keeps the tubes warm and 
reduces drift at start up.

My 180 has a solid state rectifier, dual PRI/dual SEC main transformer 
and another transformer hooked to filaments of the HF osc and mixer, 
this includes a toggle switch on the back that turns power to second 
transformer.  The Volt Regulator is not the one specified.
Some of this looks home brewed by someone who had excellent technical 
knowledge, and some good craftsmanship skills.
The set does work but here are my questions.

1. Should I leave the set  as is, since it works, but without any notes 
about these parts and should fail have troubleshoot or replace them blindly?
2.  Could Hammarlund have made an almost 180A, modified the power supply 
section, but not the rest or offered a kit to upgrade from the basic 180?
3.  Would restoring the set to its original configuration be important 
value wise?
4.  Where is the serial number located?

Thanks
Mark

Tim Kass wrote:

>
> "alittle pricy" is a bit of an understatement, I have found it cheaper 
> to buy another used unit that the transformer tests OK in.  Hammarlund 
> and Hallicrafters use alot of the same transformers in their 
> receivers.  I wanted to replace a bad transformater in a Drake AC3 
> power supply, Peter Dahl wanted something like $150 for the 
> transformer....silly when you can buy good used AC3/AC4 complete power 
> supplies and working for about $75 - $100.
>
> 73, Tim
> K8WBL
>
>
>
>> From: "Eugene Balinski" <eugeneb at nni.com>
>> To: Roy Morgan <roy.morgan at nist.gov>,Gilbert Guimaraes 
>> <gmark.guimaraes at verizon.net>
>> CC: Hammarlund List <hammarlund at mailman.qth.net>
>> Subject: Re: [Hammarlund] HQ-180 Power Transformer
>> Date: Fri, 31 Mar 2006 10:06:25 -0500
>>
>> Roy and Mark,
>>
>>    Good suggetions, especially about the transformer
>> rewinder.  For rewinders, you might try Peter Dahl.
>>
>> 5869 Waycross Ave.,
>> El Paso, TX 79924
>> 915-751-2300 Tele
>> 915-751-0768 fax
>>
>> http://www.pwdahl.com/
>>
>> Peter WILL build a transformer for you.  It may be a little
>> pricy, but it will be very good.  Give him a call, he may
>> have the design info in stock already.
>>
>> Hope this helps,
>>
>> 73,
>>
>>    Gene K1NR
>>
>>
>> On Fri, 31 Mar 2006 09:27:15 -0500
>>  Roy Morgan <roy.morgan at nist.gov> wrote:
>> > At 09:12 PM 3/30/2006, you wrote:
>> > >I have a HQ-180C that needs a power transformer.  I am
>> > willing to purchase one, or a parts radio if need be.
>> >  Also is anyone has alternate solution any help would be
>> > appreciated.
>> >
>> >
>> > Mark,
>> >
>> > 0) determine voltage requirements and dimensions
>> >
>> > 1) Investigate eBay for transformers.
>> > 2) Look for Hammond transformers - main web site to find
>> > the number you need, AES to see if they have it, or other
>> > distributors mentioned recently on mailing lists.
>> >
>> > 3) probably the best choice: contact the fellow who
>> > rewinds transformers and get a quote from him:
>> > Gary Brown
>> > "GBrown" <gkbrown at gwi.net>
>> >
>> > Roy
>> >
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>
>
>
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